Questões de Concurso Público METRÔ-SP 2010 para Analista Treinee - Matemática

Foram encontradas 60 questões

Q361813 Português
Estradas e viajantes

A linguagem nossa de cada dia pode ser altamente expressiva. Não sei até quando sobreviverão expressões, ditados, fórmulas proverbiais, modos de dizer que atravessaram o tempo falando as coisas de um jeito muito especial, gostoso, sugestivo. Acabarão por cair todas em desuso numa época como a nossa, cheia de pressa e sem nenhuma paciência, ou apenas se renovarão?

Algumas expressões são tão fortes que resistem aos séculos. Haverá alguma língua que não estabeleça formas de comparação entre vida e viagem, vida e caminho, vida e estrada? O grande Dante já começava a Divina Comédia com “No meio do caminho de nossa vida...”. Se a vida é uma viagem, a
grande viagem só pode ser... a morte, fim do nosso caminho. “Ela partiu", “Ele se foi”, dizemos. E assim vamos seguindo...

Quando menino, ouvia com estranheza a frase “Cuidado, tem boi na linha”. Como não havia linha de trem nem boi por perto, e as pessoas olhavam disfarçadamente para mim, comecei a desconfiar, mas sem compreender, que o boi era eu; mas como assim? Mais tarde vim a entender a tradução completa e prosaica: “suspendamos a conversa, porque há alguém que não deve ouvi-la”. Uma outra expressão pitoresca, que eu já entendia, era “calça de pular brejo” ou “calça de atravessar rio”, no caso de pernas crescidas ou calças encolhidas, tudo constatado antes de pegar algum caminho.

Já adulto, vim a dar com o termo “passagem”, no sentido fúnebre. “Passou desta para melhor”. Situação difícil: “estar numa encruzilhada”. Fim de vida penoso? “Também, já está subindo a ladeira dos oitenta...” São incontáveis os exemplos, é uma retórica inteira dedicada a imagens como essas. Obviamente, os poetas, especialistas em imagens, se encarregam de multiplicá-las. “Tinha uma pedra no meio do caminho”, queixou-se uma vez, e para sempre, o poeta Carlos Drummond de Andrade, fornecendo-nos um símbolo essencial para todo e qualquer obstáculo que um caminhante fatalmente enfrenta na estrada da vida, neste mundo velho sem porteira...

(Peregrino Solerte, inédito)
Atente para as seguintes afirmações:

I. No 1o parágrafo, expressa-se a convicção de que os modos de dizer mais expressivos não sobreviverão nos tempos modernos, por serem avaliados como ineficazes nos processos de comunicação.
II.No 3o parágrafo, a impossibilidade de o menino compreender a frase ouvida aos adultos deveu-se ao fato de estar traduzida em linguagem prosaica.
III. No 4o parágrafo, reconhece-se nos poetas a capacidade de enriquecimento expressivo da linguagem, especialistas que são na criação de imagens.

Em relação ao texto, está correto APENAS o que se afirma em

Alternativas
Q361815 Inglês
Subways

Posted on Friday March 27th, 2009 by Jebediah Reed

To give some sense of the pace of public works construction in China, the city of Guangzhou is planning to open 83 miles of new subway lines by the end of next year. Meanwhile, New York - a city of about the same size - has been playing around with the 1.7-mile Second Avenue line for
decades now. China also builds subways rather cheaply - $100 million per mile versus $ 2.4 billion per mile in the Big Apple.

Not surprisingly, projects there are more aggressive in all respects: there are 60 tunnel boring machines operating in Guangzhou, while only one is slated for the Second Avenue project;workers put in five 12-hour shifts a week (and if they don’t like it, they can go pound glacial till); and seizing property is a breeze.

An article in the Business section of today’s NY Times (Clash of Subways and Car Culture in Chinese Cities by Keith Bradsher) [VERB] a smart look at the forces at play as China goes on a transit infrastructure spending spree while it simultaneously becomes evermore sprawling and car-centric.

Here’s one interesting passage, [CONJUNCTION] the story is worth reading in its entirety:

Western mass transit experts applaud China for investing billions in systems that will put less stress on the environment and on cities. But they warn that other Chinese policies, like allowing real estate developers to build sprawling new suburbs, undermine the benefits of the mass transit boom.

Mr. Chan Shao Zhang , a 67-year-old engineer in charge of the works in Guangzhou, defended Guangzhou’s combination of cars and subways, saying that the city built a subway line to a new Toyota assembly plant to help employees and suppliers reach it.

Subways have been most competitive in cities like New York that have high prices for parking, and tolls for bridges and tunnels, discouraging car use. Few Chinese cities have been willing to follow suit, other than Shanghai, which charges a fee of several thousand dollars for each license plate.

The cost and physical limitations of subways have discouraged most cities from building new ones. For instance, only Tokyo has a subway system that carries more people than its buses. The buses are cheaper and able to serve far more streets but move more slowly, pollute more and contribute to traffic congestion.

China has reason to worry. It surpassed the United States in total vehicle sales for the first time in January, although the United States remained slightly ahead in car sales. But in February, China overtook the United States in both, in part because the global downturn has hurt auto sales much more in the United States than in China.

There are many countervaling forces imagem-001.jpg . China has passed its own stimulus package and the government is eager to put people to work, create economic activity, and build modern infrastructure. The Guangzhou project is part of major national transit buildout. But the nation’s cities are also sprawling beasts, and in that sense, more suited to cars than trains. Not shockingly, many Chinese prefer the former.


(Adapted from http://www.infrastructurist.com/2009/03/27/-building-a-subway-is-96-percent-cheaper-in-china/)
The correct translation for pace, as it is used in the 1st paragraph of the text, is
Alternativas
Q361816 Inglês
Subways

Posted on Friday March 27th, 2009 by Jebediah Reed

To give some sense of the pace of public works construction in China, the city of Guangzhou is planning to open 83 miles of new subway lines by the end of next year. Meanwhile, New York - a city of about the same size - has been playing around with the 1.7-mile Second Avenue line for
decades now. China also builds subways rather cheaply - $100 million per mile versus $ 2.4 billion per mile in the Big Apple.

Not surprisingly, projects there are more aggressive in all respects: there are 60 tunnel boring machines operating in Guangzhou, while only one is slated for the Second Avenue project;workers put in five 12-hour shifts a week (and if they don’t like it, they can go pound glacial till); and seizing property is a breeze.

An article in the Business section of today’s NY Times (Clash of Subways and Car Culture in Chinese Cities by Keith Bradsher) [VERB] a smart look at the forces at play as China goes on a transit infrastructure spending spree while it simultaneously becomes evermore sprawling and car-centric.

Here’s one interesting passage, [CONJUNCTION] the story is worth reading in its entirety:

Western mass transit experts applaud China for investing billions in systems that will put less stress on the environment and on cities. But they warn that other Chinese policies, like allowing real estate developers to build sprawling new suburbs, undermine the benefits of the mass transit boom.

Mr. Chan Shao Zhang , a 67-year-old engineer in charge of the works in Guangzhou, defended Guangzhou’s combination of cars and subways, saying that the city built a subway line to a new Toyota assembly plant to help employees and suppliers reach it.

Subways have been most competitive in cities like New York that have high prices for parking, and tolls for bridges and tunnels, discouraging car use. Few Chinese cities have been willing to follow suit, other than Shanghai, which charges a fee of several thousand dollars for each license plate.

The cost and physical limitations of subways have discouraged most cities from building new ones. For instance, only Tokyo has a subway system that carries more people than its buses. The buses are cheaper and able to serve far more streets but move more slowly, pollute more and contribute to traffic congestion.

China has reason to worry. It surpassed the United States in total vehicle sales for the first time in January, although the United States remained slightly ahead in car sales. But in February, China overtook the United States in both, in part because the global downturn has hurt auto sales much more in the United States than in China.

There are many countervaling forces imagem-001.jpg . China has passed its own stimulus package and the government is eager to put people to work, create economic activity, and build modern infrastructure. The Guangzhou project is part of major national transit buildout. But the nation’s cities are also sprawling beasts, and in that sense, more suited to cars than trains. Not shockingly, many Chinese prefer the former.


(Adapted from http://www.infrastructurist.com/2009/03/27/-building-a-subway-is-96-percent-cheaper-in-china/)
The underlined word there, in the 2nd paragraph, refers to
Alternativas
Q361817 Inglês
Subways

Posted on Friday March 27th, 2009 by Jebediah Reed

To give some sense of the pace of public works construction in China, the city of Guangzhou is planning to open 83 miles of new subway lines by the end of next year. Meanwhile, New York - a city of about the same size - has been playing around with the 1.7-mile Second Avenue line for
decades now. China also builds subways rather cheaply - $100 million per mile versus $ 2.4 billion per mile in the Big Apple.

Not surprisingly, projects there are more aggressive in all respects: there are 60 tunnel boring machines operating in Guangzhou, while only one is slated for the Second Avenue project;workers put in five 12-hour shifts a week (and if they don’t like it, they can go pound glacial till); and seizing property is a breeze.

An article in the Business section of today’s NY Times (Clash of Subways and Car Culture in Chinese Cities by Keith Bradsher) [VERB] a smart look at the forces at play as China goes on a transit infrastructure spending spree while it simultaneously becomes evermore sprawling and car-centric.

Here’s one interesting passage, [CONJUNCTION] the story is worth reading in its entirety:

Western mass transit experts applaud China for investing billions in systems that will put less stress on the environment and on cities. But they warn that other Chinese policies, like allowing real estate developers to build sprawling new suburbs, undermine the benefits of the mass transit boom.

Mr. Chan Shao Zhang , a 67-year-old engineer in charge of the works in Guangzhou, defended Guangzhou’s combination of cars and subways, saying that the city built a subway line to a new Toyota assembly plant to help employees and suppliers reach it.

Subways have been most competitive in cities like New York that have high prices for parking, and tolls for bridges and tunnels, discouraging car use. Few Chinese cities have been willing to follow suit, other than Shanghai, which charges a fee of several thousand dollars for each license plate.

The cost and physical limitations of subways have discouraged most cities from building new ones. For instance, only Tokyo has a subway system that carries more people than its buses. The buses are cheaper and able to serve far more streets but move more slowly, pollute more and contribute to traffic congestion.

China has reason to worry. It surpassed the United States in total vehicle sales for the first time in January, although the United States remained slightly ahead in car sales. But in February, China overtook the United States in both, in part because the global downturn has hurt auto sales much more in the United States than in China.

There are many countervaling forces imagem-001.jpg . China has passed its own stimulus package and the government is eager to put people to work, create economic activity, and build modern infrastructure. The Guangzhou project is part of major national transit buildout. But the nation’s cities are also sprawling beasts, and in that sense, more suited to cars than trains. Not shockingly, many Chinese prefer the former.


(Adapted from http://www.infrastructurist.com/2009/03/27/-building-a-subway-is-96-percent-cheaper-in-china/)
A synonym for a breeze, as it is used in the 2nd paragraph of the text, is
Alternativas
Q361818 Inglês
Subways

Posted on Friday March 27th, 2009 by Jebediah Reed

To give some sense of the pace of public works construction in China, the city of Guangzhou is planning to open 83 miles of new subway lines by the end of next year. Meanwhile, New York - a city of about the same size - has been playing around with the 1.7-mile Second Avenue line for
decades now. China also builds subways rather cheaply - $100 million per mile versus $ 2.4 billion per mile in the Big Apple.

Not surprisingly, projects there are more aggressive in all respects: there are 60 tunnel boring machines operating in Guangzhou, while only one is slated for the Second Avenue project;workers put in five 12-hour shifts a week (and if they don’t like it, they can go pound glacial till); and seizing property is a breeze.

An article in the Business section of today’s NY Times (Clash of Subways and Car Culture in Chinese Cities by Keith Bradsher) [VERB] a smart look at the forces at play as China goes on a transit infrastructure spending spree while it simultaneously becomes evermore sprawling and car-centric.

Here’s one interesting passage, [CONJUNCTION] the story is worth reading in its entirety:

Western mass transit experts applaud China for investing billions in systems that will put less stress on the environment and on cities. But they warn that other Chinese policies, like allowing real estate developers to build sprawling new suburbs, undermine the benefits of the mass transit boom.

Mr. Chan Shao Zhang , a 67-year-old engineer in charge of the works in Guangzhou, defended Guangzhou’s combination of cars and subways, saying that the city built a subway line to a new Toyota assembly plant to help employees and suppliers reach it.

Subways have been most competitive in cities like New York that have high prices for parking, and tolls for bridges and tunnels, discouraging car use. Few Chinese cities have been willing to follow suit, other than Shanghai, which charges a fee of several thousand dollars for each license plate.

The cost and physical limitations of subways have discouraged most cities from building new ones. For instance, only Tokyo has a subway system that carries more people than its buses. The buses are cheaper and able to serve far more streets but move more slowly, pollute more and contribute to traffic congestion.

China has reason to worry. It surpassed the United States in total vehicle sales for the first time in January, although the United States remained slightly ahead in car sales. But in February, China overtook the United States in both, in part because the global downturn has hurt auto sales much more in the United States than in China.

There are many countervaling forces imagem-001.jpg . China has passed its own stimulus package and the government is eager to put people to work, create economic activity, and build modern infrastructure. The Guangzhou project is part of major national transit buildout. But the nation’s cities are also sprawling beasts, and in that sense, more suited to cars than trains. Not shockingly, many Chinese prefer the former.


(Adapted from http://www.infrastructurist.com/2009/03/27/-building-a-subway-is-96-percent-cheaper-in-china/)
The correct word that replaces [VERB] in the text is
Alternativas
Q361819 Inglês
Subways

Posted on Friday March 27th, 2009 by Jebediah Reed

To give some sense of the pace of public works construction in China, the city of Guangzhou is planning to open 83 miles of new subway lines by the end of next year. Meanwhile, New York - a city of about the same size - has been playing around with the 1.7-mile Second Avenue line for
decades now. China also builds subways rather cheaply - $100 million per mile versus $ 2.4 billion per mile in the Big Apple.

Not surprisingly, projects there are more aggressive in all respects: there are 60 tunnel boring machines operating in Guangzhou, while only one is slated for the Second Avenue project;workers put in five 12-hour shifts a week (and if they don’t like it, they can go pound glacial till); and seizing property is a breeze.

An article in the Business section of today’s NY Times (Clash of Subways and Car Culture in Chinese Cities by Keith Bradsher) [VERB] a smart look at the forces at play as China goes on a transit infrastructure spending spree while it simultaneously becomes evermore sprawling and car-centric.

Here’s one interesting passage, [CONJUNCTION] the story is worth reading in its entirety:

Western mass transit experts applaud China for investing billions in systems that will put less stress on the environment and on cities. But they warn that other Chinese policies, like allowing real estate developers to build sprawling new suburbs, undermine the benefits of the mass transit boom.

Mr. Chan Shao Zhang , a 67-year-old engineer in charge of the works in Guangzhou, defended Guangzhou’s combination of cars and subways, saying that the city built a subway line to a new Toyota assembly plant to help employees and suppliers reach it.

Subways have been most competitive in cities like New York that have high prices for parking, and tolls for bridges and tunnels, discouraging car use. Few Chinese cities have been willing to follow suit, other than Shanghai, which charges a fee of several thousand dollars for each license plate.

The cost and physical limitations of subways have discouraged most cities from building new ones. For instance, only Tokyo has a subway system that carries more people than its buses. The buses are cheaper and able to serve far more streets but move more slowly, pollute more and contribute to traffic congestion.

China has reason to worry. It surpassed the United States in total vehicle sales for the first time in January, although the United States remained slightly ahead in car sales. But in February, China overtook the United States in both, in part because the global downturn has hurt auto sales much more in the United States than in China.

There are many countervaling forces imagem-001.jpg . China has passed its own stimulus package and the government is eager to put people to work, create economic activity, and build modern infrastructure. The Guangzhou project is part of major national transit buildout. But the nation’s cities are also sprawling beasts, and in that sense, more suited to cars than trains. Not shockingly, many Chinese prefer the former.


(Adapted from http://www.infrastructurist.com/2009/03/27/-building-a-subway-is-96-percent-cheaper-in-china/)
The word that correctly replaces [CONJUNCTION] in the text is
Alternativas
Q361820 Inglês
Subways

Posted on Friday March 27th, 2009 by Jebediah Reed

To give some sense of the pace of public works construction in China, the city of Guangzhou is planning to open 83 miles of new subway lines by the end of next year. Meanwhile, New York - a city of about the same size - has been playing around with the 1.7-mile Second Avenue line for
decades now. China also builds subways rather cheaply - $100 million per mile versus $ 2.4 billion per mile in the Big Apple.

Not surprisingly, projects there are more aggressive in all respects: there are 60 tunnel boring machines operating in Guangzhou, while only one is slated for the Second Avenue project;workers put in five 12-hour shifts a week (and if they don’t like it, they can go pound glacial till); and seizing property is a breeze.

An article in the Business section of today’s NY Times (Clash of Subways and Car Culture in Chinese Cities by Keith Bradsher) [VERB] a smart look at the forces at play as China goes on a transit infrastructure spending spree while it simultaneously becomes evermore sprawling and car-centric.

Here’s one interesting passage, [CONJUNCTION] the story is worth reading in its entirety:

Western mass transit experts applaud China for investing billions in systems that will put less stress on the environment and on cities. But they warn that other Chinese policies, like allowing real estate developers to build sprawling new suburbs, undermine the benefits of the mass transit boom.

Mr. Chan Shao Zhang , a 67-year-old engineer in charge of the works in Guangzhou, defended Guangzhou’s combination of cars and subways, saying that the city built a subway line to a new Toyota assembly plant to help employees and suppliers reach it.

Subways have been most competitive in cities like New York that have high prices for parking, and tolls for bridges and tunnels, discouraging car use. Few Chinese cities have been willing to follow suit, other than Shanghai, which charges a fee of several thousand dollars for each license plate.

The cost and physical limitations of subways have discouraged most cities from building new ones. For instance, only Tokyo has a subway system that carries more people than its buses. The buses are cheaper and able to serve far more streets but move more slowly, pollute more and contribute to traffic congestion.

China has reason to worry. It surpassed the United States in total vehicle sales for the first time in January, although the United States remained slightly ahead in car sales. But in February, China overtook the United States in both, in part because the global downturn has hurt auto sales much more in the United States than in China.

There are many countervaling forces imagem-001.jpg . China has passed its own stimulus package and the government is eager to put people to work, create economic activity, and build modern infrastructure. The Guangzhou project is part of major national transit buildout. But the nation’s cities are also sprawling beasts, and in that sense, more suited to cars than trains. Not shockingly, many Chinese prefer the former.


(Adapted from http://www.infrastructurist.com/2009/03/27/-building-a-subway-is-96-percent-cheaper-in-china/)
The expression that correctly fills the blank imagem-002.jpg at the end of the text is
Alternativas
Q361851 Português
Estradas e viajantes


      A linguagem nossa de cada dia pode ser altamente expressiva. Não sei até quando sobreviverão expressões, ditados, fórmulas proverbiais, modos de dizer que atravessaram o tempo falando as coisas de um jeito muito especial, gostoso, sugestivo. Acabarão por cair todas em desuso numa época como a nossa, cheia de pressa e sem nenhuma paciência, ou apenas se renovarão?

      Algumas expressões são tão fortes que resistem aos séculos. Haverá alguma língua que não estabeleça formas de comparação entre vida e viagem, vida e caminho, vida e estrada? O grande Dante já começava a Divina Comédia com “No meio do caminho de nossa vida...”. Se a vida é uma viagem, a grande viagem só pode ser... a morte, fim do nosso caminho. “Ela partiu", “Ele se foi”, dizemos. E assim vamos seguindo...

      Quando menino, ouvia com estranheza a frase “Cuidado, tem boi na linha”. Como não havia linha de trem nem boi por perto, e as pessoas olhavam disfarçadamente para mim, comecei a desconfiar, mas sem compreender, que o boi era eu; mas como assim? Mais tarde vim a entender a tradução completa e prosaica: “suspendamos a conversa, porque há alguém que não deve ouvi-la”. Uma outra expressão pitoresca, que eu já entendia, era “calça de pular brejo” ou “calça de atravessar rio”, no caso de pernas crescidas ou calças encolhidas, tudo constatado antes de pegar algum caminho.

      Já adulto, vim a dar com o termo “passagem”, no sentido fúnebre. “Passou desta para melhor”. Situação difícil: “estar numa encruzilhada”. Fim de vida penoso? “Também, já está subindo a ladeira dos oitenta...” São incontáveis os exemplos, é uma retórica inteira dedicada a imagens como essas.
Obviamente, os poetas, especialistas em imagens, se encarregam de multiplicá-las. “Tinha uma pedra no meio do caminho”, queixou-se uma vez, e para sempre, o poeta Carlos Drummond de Andrade, fornecendo-nos um símbolo essencial para todo e qualquer obstáculo que um caminhante fatalmente enfrenta na estrada da vida, neste mundo velho sem porteira...



(Peregrino Solerte, inédito)

As expressões E assim vamos seguindo e neste mundo velho sem porteira
Alternativas
Q361853 Português
Apoio ao transporte urbano


      O BNDES tem um programa de apoio a projetos de transportes públicos, abrangendo todos os investimentos necessários à qualificação do espaço urbano no entorno do empreendimento. O apoio pode se dar visando a forma de operação específica, sempre com a preocupação de mirar os seguintes objetivos: a) racionalização econômica, com redução dos custos totais do sistema; b) privilégio do transporte coletivo sobre o individual; c)integração tarifária e física, com redução do ônus e do tempo de deslocamento do usuário; d) acessibilidade universal, inclusive para os usuários com necessidades especiais; e) aprimoramento da gestão e da fiscalização do sistema; f) redução dos níveis de poluição sonora e do ar, do consumo energético e dos congestionamentos; g) revalorização urbana do entorno dos projetos.

      O BNDES admite um nível de participação em até 100%, no caso de municípios de baixa renda ou de média renda inferior localizados nas regiões Norte e Nordeste.


(Baseado em informações do site oficial do BNDES)

O verbo indicado entre parênteses deverá flexionar-se numa forma do singular para preencher corretamente a lacuna da frase:
Alternativas
Q361892 Português
Está correta a seguinte afirmação sobre um procedimento construtivo do texto:
Alternativas
Q362064 Matemática
A tabela de frequências absolutas abaixo corresponde à distribuição das medidas de um componente industrial em que o valor da média aritmética destas medidas é igual a 3,4 metros (valor calculado considerando que todos os valores incluídos num certo intervalo de classe são coincidentes com o ponto médio deste intervalo). A frequência do 4o intervalo de classe está representada por f 4.

imagem-003.jpg

A respectiva mediana destas medidas, obtida pelo método da interpolação linear, apresenta o valor de
Alternativas
Q362065 Matemática
A distribuição dos preços unitários de determinada peça no mercado está representada pelo histograma abaixo, com os intervalos de classe fechados à esquerda e abertos à direita. No eixo vertical estão assinaladas as respectivas densidades de frequências, em (R$) -1. Define-se densidade de frequência de um intervalo de classe como sendo o quociente da divisão da respectiva frequência relativa pela correspondente amplitude do intervalo.

imagem-004.jpg

Analisando a distribuição dos preços unitários desta peça, tem-se que
Alternativas
Q362066 Matemática
Com relação às definições e às propriedades das medidas de tendência central, é correto afirmar:
Alternativas
Q362067 Matemática
Em uma cidade, a média aritmética dos salários dos trabalhadores que possuem nível superior completo (Grupo 1) supera em R$ 1.000,00 a média aritmética do restante dos trabalhadores (Grupo 2). O coeficiente de variação do Grupo 1 é igual a 10% e do Grupo 2 igual a 15%. As variâncias dos salários dos 2 grupos são iguais e a quantidade de trabalhadores do Grupo 2 é o triplo da quantidade de trabalhadores do Grupo 1. A média aritmética dos salários de todos os trabalhadores desta cidade é igual a
Alternativas
Q362068 Matemática
A probabilidade de um indivíduo estar vivo daqui a 10 anos é igual a 3/5 da probabilidade de sua esposa estar viva daqui a 10 anos. A probabilidade de pelo menos um deles estar vivo daqui a 10 anos é igual a 4/5 . Considere que os eventos "o indivíduo estar vivo daqui a 10 anos" e "a esposa estar viva daqui a 10 anos" são independentes. Então, a probabilidade da esposa estar viva daqui a 10 anos é:
Alternativas
Q362069 Matemática
Em uma empresa, 20% dos homens e 10% das mulheres têm salários superiores a R$ 5.000,00. Sabe-se que 40% dos empregados desta empresa são mulheres. Escolhendo aleatoriamente um empregado desta empresa e verificando-se que seu salário não é superior a R$ 5.000,00, a probabilidade dele ser homem é:
Alternativas
Q362070 Matemática
Considere que P(E) é a probabilidade de ocorrência do evento E. Se P(A) = 0,60, P(B) = 0,70 e P(A ∩ B) = x, então:
Alternativas
Q362071 Matemática
Seja uma população normalmente distribuída com média µ e variância unitária. Uma amostra aleatória simples (X1, X2, X3) desta população permitiu obter 3 estimadores para µ:

Y1 = 1/3 X1 + 1/3 X2 + 1/3 X3

Y2 = 1/4 X1 + 1/3 X2 + 5/12 X3

Y3 = 1/8 X1 + 1/4 X2 + 5/8 X3

De acordo com a teoria da estimação,
Alternativas
Q362072 Matemática
Numa pesquisa eleitoral para o cargo de prefeito em uma grande cidade, 60% dos eleitores manifestaram-se a favor do candidato X. O tamanho da amostra foi de 2.000 eleitores, considerando normal a distribuição amostral da frequência relativa dos eleitores favoráveis a X. O intervalo de confiança ao nível (1-α) foi [58%, 62%]. Caso o tamanho da amostra tivesse sido de n e apurando-se um intervalo de confiança de [59%, 61%] ao nível (1-a), tem-se que o valor de n é igual a
Alternativas
Q362073 Matemática
Um teste estatístico consiste das hipóteses H0: µ = µ0 (hipótese nula) contra H1: µ < µ0 (hipótese alternativa) a um determinado nível de significância. O erro estatístico tipo II é a probabilidade de
Alternativas
Respostas
21: C
22: B
23: B
24: C
25: E
26: D
27: E
28: A
29: A
30: E
31: D
32: C
33: B
34: E
35: B
36: A
37: B
38: C
39: E
40: A