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Analise os gráficos a seguir referentes às funções de autocorrelação e autocorrelação parcial de uma determinada série temporal.
Qual processo é o mais adequado para modelar esta série?
Analisando o gráfico abaixo, referente à densidade de probabilidade de uma determinada variável aleatória, o que se pode inferir sobre a assimetria da distribuição?
Observando a tabela abaixo para uma análise de variância ANOVA simples, o que se pode concluir a respeito das seguintes hipóteses?
H0 = média dos tratamentos são iguais
H1 = pelo menos duas médias não são iguais
As alturas de 37 indivíduos foram medidas e resultaram no ramo-e-folhas a seguir. A amplitude total, o desvio interquartílico e a mediana em centímetros são respectivamente:
Seja a média amostral de uma variável aleatória de
tamanho n de uma população com variância
conhecida σ2. O intervalo de confiança de 100(1 − α)%
para média μ é dado por:
Seja S2 a variância amostral de uma amostra
aleatória de tamanho n proveniente uma distribuição
N(μ, σ2). Neste caso tem distribuição:
Uma variável aleatória possui a seguinte função de densidade de probabilidade:
Portanto, sua função geradora de momentos é:
A duração em horas para a descontaminação de certo reservatório de água, é uma variável aleatória contínua X com função de distribuição
onde B é uma constante, pode-se afirmar que:
Read the text below and answer the questions that follow.
How Telecommuting Works
Telecommuting, which is growing in popularity, allows employees to avoid long commutes.
“Brring,” the alarm startles you out of a deep sleep. It’s 8 a.m. on Monday morning. Time to head to the office. You roll out of bed, brush your teeth and stumble your way to the kitchen to grab some coffee.
Moments later, you head to the office, still wearing your pajamas and fluffy slippers. Luckily for you, you don’t have to go far – you work at home. Telecommuting, or working at home, has grown in popularity over the last 20 years.
On an increasing basis, workers are saying “no” to long commutes and opting to work at home. In fact, the U.S. Census Bureau reports that the number of employees working from home grew by 23 percent from 1990 to 2000.
Telecommuting workers revel in making their own schedule – allowing them to schedule work around family and personal commitments. With the ready availability of technology tools, like the Internet and home computers, companies are more willing to let employees work from home.
(Adapted from: http://home.howstuffworks.com/telecommuting.htm Access on 18 January, 2014)
The technology tools mentioned in the text refer to:
Read the text below and answer the questions that follow.
How Telecommuting Works
Telecommuting, which is growing in popularity, allows employees to avoid long commutes.
“Brring,” the alarm startles you out of a deep sleep. It’s 8 a.m. on Monday morning. Time to head to the office. You roll out of bed, brush your teeth and stumble your way to the kitchen to grab some coffee.
Moments later, you head to the office, still wearing your pajamas and fluffy slippers. Luckily for you, you don’t have to go far – you work at home. Telecommuting, or working at home, has grown in popularity over the last 20 years.
On an increasing basis, workers are saying “no” to long commutes and opting to work at home. In fact, the U.S. Census Bureau reports that the number of employees working from home grew by 23 percent from 1990 to 2000.
Telecommuting workers revel in making their own schedule – allowing them to schedule work around family and personal commitments. With the ready availability of technology tools, like the Internet and home computers, companies are more willing to let employees work from home.
(Adapted from: http://home.howstuffworks.com/telecommuting.htm Access on 18 January, 2014)
The pronoun THEM in the last paragraph of the text refers to:
Read the text below and answer the questions that follow.
How Telecommuting Works
Telecommuting, which is growing in popularity, allows employees to avoid long commutes.
“Brring,” the alarm startles you out of a deep sleep. It’s 8 a.m. on Monday morning. Time to head to the office. You roll out of bed, brush your teeth and stumble your way to the kitchen to grab some coffee.
Moments later, you head to the office, still wearing your pajamas and fluffy slippers. Luckily for you, you don’t have to go far – you work at home. Telecommuting, or working at home, has grown in popularity over the last 20 years.
On an increasing basis, workers are saying “no” to long commutes and opting to work at home. In fact, the U.S. Census Bureau reports that the number of employees working from home grew by 23 percent from 1990 to 2000.
Telecommuting workers revel in making their own schedule – allowing them to schedule work around family and personal commitments. With the ready availability of technology tools, like the Internet and home computers, companies are more willing to let employees work from home.
(Adapted from: http://home.howstuffworks.com/telecommuting.htm Access on 18 January, 2014)
According to the text, workers:
Read the text below and answer the questions that follow.
How Telecommuting Works
Telecommuting, which is growing in popularity, allows employees to avoid long commutes.
“Brring,” the alarm startles you out of a deep sleep. It’s 8 a.m. on Monday morning. Time to head to the office. You roll out of bed, brush your teeth and stumble your way to the kitchen to grab some coffee.
Moments later, you head to the office, still wearing your pajamas and fluffy slippers. Luckily for you, you don’t have to go far – you work at home. Telecommuting, or working at home, has grown in popularity over the last 20 years.
On an increasing basis, workers are saying “no” to long commutes and opting to work at home. In fact, the U.S. Census Bureau reports that the number of employees working from home grew by 23 percent from 1990 to 2000.
Telecommuting workers revel in making their own schedule – allowing them to schedule work around family and personal commitments. With the ready availability of technology tools, like the Internet and home computers, companies are more willing to let employees work from home.
(Adapted from: http://home.howstuffworks.com/telecommuting.htm Access on 18 January, 2014)
Choose the correct sentence, according to the text.
Read the text below and answer the questions that follow.
How Telecommuting Works
Telecommuting, which is growing in popularity, allows employees to avoid long commutes.
“Brring,” the alarm startles you out of a deep sleep. It’s 8 a.m. on Monday morning. Time to head to the office. You roll out of bed, brush your teeth and stumble your way to the kitchen to grab some coffee.
Moments later, you head to the office, still wearing your pajamas and fluffy slippers. Luckily for you, you don’t have to go far – you work at home. Telecommuting, or working at home, has grown in popularity over the last 20 years.
On an increasing basis, workers are saying “no” to long commutes and opting to work at home. In fact, the U.S. Census Bureau reports that the number of employees working from home grew by 23 percent from 1990 to 2000.
Telecommuting workers revel in making their own schedule – allowing them to schedule work around family and personal commitments. With the ready availability of technology tools, like the Internet and home computers, companies are more willing to let employees work from home.
(Adapted from: http://home.howstuffworks.com/telecommuting.htm Access on 18 January, 2014)
According to the text, telecommuting refers to:
Correlacione as pragas virtuais (Coluna A) com as ações adequadas para evitar infecção dos computadores (Coluna B) e, em seguida, assinale a alternativa que apresenta a sequência correta.
Quanto às opções de recuperação do sistema operacional Windows (versão 7), marque V para verdadeiro ou F para falso e, em seguida, assinale a alternativa que apresenta a sequência correta.
( ) A opção “Reparo de Inicialização” corrige determinados problemas, como arquivos do sistema ausentes ou danificados, que podem impedir o Windows de ser iniciado corretamente.
( ) A opção “Restauração do Sistema” restaura os arquivos do sistema do computador para um ponto anterior no tempo, sem afetar os arquivos, como e-mail, documentos ou fotos.
( ) A opção “Recuperação da imagem do sistema” cria uma imagem do sistema, ou seja, trata-se de um backup personalizado da partição que contém o Windows sem incluir programas e dados do usuário, como documentos, imagens e músicas.
( ) A opção “Prompt de comando” permite executar operações relacionadas à recuperação e outras ferramentas de linha de comando, a fim de diagnosticar e solucionar problemas.
Text II
Off the Deep End in Brazil
Gerald Herbert
With crude still hemorrhaging into the Gulf of
Mexico, deep-water drilling might seem taboo just
now. In fact, extreme oil will likely be the new normal.
Despite the gulf tragedy, the quest for oil and gas in
5 the most difficult places on the planet is just getting
underway. Prospecting proceeds apace in the ultra-
deepwater reserves off the coasts of Ghana and
Nigeria, the sulfur-laden depths of the Black Sea, and
the tar sands of Venezuela’s Orinoco Basin. Brazil’s
10 Petrobras, which already controls a quarter of global
deepwater operations, is just starting to plumb its 9 to
15 billion barrels of proven reserves buried some four
miles below the Atlantic.
The reason is simple: after a century and a
15 half of breakneck oil prospecting, the easy stuff is
history. Blistering growth in emerging nations has
turned the power grid upside down. India and China
will consume 28 percent of global energy by 2030,
triple the juice they required in 1990. China is set to
20 overtake the U.S. in energy consumption by 2014.
And now that the Great Recession is easing, the
earth’s hoard of conventional oil is waning even
faster. The International Energy Agency reckons the
world will need to find 65 million additional barrels a
25 day by 2030. If the U.S. offshore-drilling moratorium
drags on, look for idled rigs heading to other shores.
Available in:
<http://www.newsweek.com/2010/06/13/off-the-deep-end-in-brazil.html>
Retrieved on: June 19, 2011.
In Text II, Herbert illustrates the possibility of “...idled rigs heading to other shores.” (line 26) EXCEPT when he mentions
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