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Considere as asserções a seguir.
A região de rejeição de um teste de hipóteses é obtida sob a suposição de que a hipótese da nulidade (H0) é verdadeira.
PORQUE
Em testes de hipóteses, o erro do tipo I é aquele cometido ao se rejeitar a hipótese da nulidade (H0) quando esta é verdadeira.
Analisando-se as asserções, conclui-se que
Considere as asserções a seguir. A média amostral é sempre um estimador não viciado para a média de uma população.
PORQUE
O erro padrão do estimador não viciado para a média de uma população é maior do que a variância da população.
Analisando-se as asserções, conclui-se que
Considere as asserções a seguir.
O Coeficiente de Correlação Linear de Pearson é necessariamente um número no intervalo (−1 , 1).
PORQUE
O Coeficiente de Correlação Linear de Pearson só pode ser calculado para variáveis quantitativas.
Analisando-se as asserções, conclui-se que
Considere as asserções a seguir. Quanto menor o coeficiente de variação percentual, mais os dados estão concentrados em torno da média.
PORQUE
O coeficiente de variação percentual é inversamente proporcional ao desvio padrão do conjunto de dados.
Analisando-se as asserções, conclui-se que
Considere as asserções a seguir.
A amplitude interquartil é uma medida de dispersão de um conjunto de dados.
PORQUE
A amplitude interquartil é tanto maior quanto maior for a variabilidade dos dados.
Analisando-se as asserções, conclui-se que
Considere as asserções a seguir.
A moda de um conjunto de observações é sempre um dos valores observados.
PORQUE
A moda é uma medida de posição de um conjunto de observações.
Analisando-se as asserções, conclui-se que
Considere as asserções a seguir. Em distribuições assimétricas à direita, a mediana é sempre maior do que a média.
PORQUE
Em distribuições com assimetria positiva, a média é afetada por valores extremos.
Analisando-se as asserções, conclui-se que
Analisando-se os gráficos, foram feitas as informações a seguir.
I - Mais de 50,0% da variação em Y é explicada pela relação linear entre Y e a variável X 2.
II - A relação linear entre Y e a variável X 3 explica 53,2% da variação em Y.
III - A variação de uma unidade em X 3 provoca um aumento de 8,69 unidades em Y.
IV - O coeficiente de correlação linear entre as variáveis Y e X 3 é maior do que entre Y e X 2.
Estão corretas APENAS as afirmações
O Coeficiente de Correlação Linear de Pearson entre os desempenhos de determinados alunos em duas avaliações nacionais é igual a 0,844. Nesse caso, conclui-se que a proporção da variabilidade nos resultados de uma das avaliações explicada pela relação linear entre elas é
As questões de nos 41 a 46 são referentes aos resultados do ENADE 2006, disponíveis em www.inep.gov.br.
Responda às questões de nos 41 a 43 com base nos percentuais das respostas de alunos de uma área específica de determinada Instituição de Ensino Superior (IES), participantes do ENADE 2006, a algumas questões do questionário socioeconômico relativas aos hábitos de leitura.
Uma medida de posição adequada para os dados da questão 24 é a
As questões de nos 41 a 46 são referentes aos resultados do ENADE 2006, disponíveis em www.inep.gov.br.
Responda às questões de nos 41 a 43 com base nos percentuais das respostas de alunos de uma área específica de determinada Instituição de Ensino Superior (IES), participantes do ENADE 2006, a algumas questões do questionário socioeconômico relativas aos hábitos de leitura.
A questão de número 23 do questionário socioeconômico envolve uma variável do tipo
As questões de nos 41 a 46 são referentes aos resultados do ENADE 2006, disponíveis em www.inep.gov.br.
Responda às questões de nos 41 a 43 com base nos percentuais das respostas de alunos de uma área específica de determinada Instituição de Ensino Superior (IES), participantes do ENADE 2006, a algumas questões do questionário socioeconômico relativas aos hábitos de leitura.
Com base nesses resultados, são feitas as afirmativas a seguir.
I - Os alunos dessa IES, proporcionalmente, leram mais livros do que os demais alunos do mesmo curso no país.
II - A maioria dos alunos dessa área nessa IES tem o hábito de ler todos os assuntos dos jornais.
III - Os resultados observados na questão 24 podem ser representados graficamente por um histograma.
IV- Mais da metade dos alunos da região em que se encontra a IES leram, pelo menos, três livros no presente ano.
V - Os alunos dessa IES lêem menos livros técnicos do que os demais alunos da mesma área no estado da IES.
São corretas APENAS as afirmações
How to dig out from the information avalanche
Majority of workers feel overwhelmed by deluge of data, survey finds
By Eve Tahmincioglu
updated 8:18 p.m. ET March 16, 2008
Don’t expect Shaun Osher, the CEO of Core Group
Marketing in New York, to answer your e-mail right away.
He has stopped responding to e-mails every minute and
only checks his e-mail account twice a day. He also started
5 turning off his BlackBerry during meetings.
This tactic has made him so much more productive
that earlier this year he held a meeting with his staff of 50
and “strongly suggested” that they stop relying so heavily
on e-mail and actually start calling clients on the phone.
10 And, he requested his employees put cell phones and
PDAs on silent mode during meetings, as well as curtail
the common practice of cc-ing everybody when sending
out an e-mail. “There was so much redundancy, so much
unnecessary work,” he explains. “One person could handle
15 an issue that should take two minutes, but when an email
goes out and five people get cc-ed, then everybody
responds to it and there’s a snowball effect.”
It’s not that Osher has anything against technology. In
fact, he loves it. The problem is, last year he realized he
20 was inundated with so many e-mails and so much
information in general that he began to experience data
overload. “In the beginning, e-mail and all this data was a
great phenomenon, revolutionizing what we do. But the
pendulum has swung way too much to the other side,” he
25 maintains. “We’re less productive.”
Osher isn’t the only one out there under a data
avalanche. Thanks to technological innovations, you can
be talking to a customer on your cell phone, answering a
LinkedIn invitation on your laptop, and responding to email
30 on your PDA all at the same time. Besides, during
tough economic times, who will want to miss any
information when your job could be on the line if you indulge
in the luxury of being offline? Turns out, seven out of 10
office workers in the United States feel overwhelmed by
35 information in the workplace, and more than two in five
say they are headed for a data “breaking point,” according
to a recently released Workplace Productivity Survey.
Mike Walsh, CEO of LexisNexis U.S. Legal Markets,
says there are a host of reasons we’re all on the information
40 brink: “exponential growth of the size of the information
‘haystack,’ the immensity and immediacy of digital
communications, and the fact that professionals are not
being provided with sufficient tools and training to help
them keep pace with the growing information burden.”
45 ___ Ellen Kossek, a professor from Michigan State, believes
we are less productive in this age of 24-7 technology, and
our multitasking mentality has spawned a “not-mentallypresent”
society. “We’re becoming an attention-deficit
disorder society switching back and forth like crazy,”
50 Kossek says. “We’re connected all the time. We’re
working on planes, in coffee shops, working on the
weekends. Work is very seductive, but yet we’re actually
less effective.”
The key to getting your head above the data flood,
55 according to workplace experts, is managing and reducing
the information you’re bombarded with.
© 2008 MSNBC Interactive - (slightly adapted)
http://www.msnbc.msn.com/id/23636252/
Check the only alternative that presents a statement that is INCONSISTENT with the arguments and reasoning introduced in the text you have read.
Mark the sentence in which the idea introduced by the word in bold type is correctly described.
How to dig out from the information avalanche
Majority of workers feel overwhelmed by deluge of data, survey finds
By Eve Tahmincioglu
updated 8:18 p.m. ET March 16, 2008
Don’t expect Shaun Osher, the CEO of Core Group
Marketing in New York, to answer your e-mail right away.
He has stopped responding to e-mails every minute and
only checks his e-mail account twice a day. He also started
5 turning off his BlackBerry during meetings.
This tactic has made him so much more productive
that earlier this year he held a meeting with his staff of 50
and “strongly suggested” that they stop relying so heavily
on e-mail and actually start calling clients on the phone.
10 And, he requested his employees put cell phones and
PDAs on silent mode during meetings, as well as curtail
the common practice of cc-ing everybody when sending
out an e-mail. “There was so much redundancy, so much
unnecessary work,” he explains. “One person could handle
15 an issue that should take two minutes, but when an email
goes out and five people get cc-ed, then everybody
responds to it and there’s a snowball effect.”
It’s not that Osher has anything against technology. In
fact, he loves it. The problem is, last year he realized he
20 was inundated with so many e-mails and so much
information in general that he began to experience data
overload. “In the beginning, e-mail and all this data was a
great phenomenon, revolutionizing what we do. But the
pendulum has swung way too much to the other side,” he
25 maintains. “We’re less productive.”
Osher isn’t the only one out there under a data
avalanche. Thanks to technological innovations, you can
be talking to a customer on your cell phone, answering a
LinkedIn invitation on your laptop, and responding to email
30 on your PDA all at the same time. Besides, during
tough economic times, who will want to miss any
information when your job could be on the line if you indulge
in the luxury of being offline? Turns out, seven out of 10
office workers in the United States feel overwhelmed by
35 information in the workplace, and more than two in five
say they are headed for a data “breaking point,” according
to a recently released Workplace Productivity Survey.
Mike Walsh, CEO of LexisNexis U.S. Legal Markets,
says there are a host of reasons we’re all on the information
40 brink: “exponential growth of the size of the information
‘haystack,’ the immensity and immediacy of digital
communications, and the fact that professionals are not
being provided with sufficient tools and training to help
them keep pace with the growing information burden.”
45 ___ Ellen Kossek, a professor from Michigan State, believes
we are less productive in this age of 24-7 technology, and
our multitasking mentality has spawned a “not-mentallypresent”
society. “We’re becoming an attention-deficit
disorder society switching back and forth like crazy,”
50 Kossek says. “We’re connected all the time. We’re
working on planes, in coffee shops, working on the
weekends. Work is very seductive, but yet we’re actually
less effective.”
The key to getting your head above the data flood,
55 according to workplace experts, is managing and reducing
the information you’re bombarded with.
© 2008 MSNBC Interactive - (slightly adapted)
http://www.msnbc.msn.com/id/23636252/
Which option describes accurately the meaning relationship between the pairs of words?
In "...your job could be on the line if you indulge in the luxury of being offline?" (lines 32-33) the expressions 'on the line' and 'offline', respectively, mean
How to dig out from the information avalanche
Majority of workers feel overwhelmed by deluge of data, survey finds
By Eve Tahmincioglu
updated 8:18 p.m. ET March 16, 2008
Don’t expect Shaun Osher, the CEO of Core Group
Marketing in New York, to answer your e-mail right away.
He has stopped responding to e-mails every minute and
only checks his e-mail account twice a day. He also started
5 turning off his BlackBerry during meetings.
This tactic has made him so much more productive
that earlier this year he held a meeting with his staff of 50
and “strongly suggested” that they stop relying so heavily
on e-mail and actually start calling clients on the phone.
10 And, he requested his employees put cell phones and
PDAs on silent mode during meetings, as well as curtail
the common practice of cc-ing everybody when sending
out an e-mail. “There was so much redundancy, so much
unnecessary work,” he explains. “One person could handle
15 an issue that should take two minutes, but when an email
goes out and five people get cc-ed, then everybody
responds to it and there’s a snowball effect.”
It’s not that Osher has anything against technology. In
fact, he loves it. The problem is, last year he realized he
20 was inundated with so many e-mails and so much
information in general that he began to experience data
overload. “In the beginning, e-mail and all this data was a
great phenomenon, revolutionizing what we do. But the
pendulum has swung way too much to the other side,” he
25 maintains. “We’re less productive.”
Osher isn’t the only one out there under a data
avalanche. Thanks to technological innovations, you can
be talking to a customer on your cell phone, answering a
LinkedIn invitation on your laptop, and responding to email
30 on your PDA all at the same time. Besides, during
tough economic times, who will want to miss any
information when your job could be on the line if you indulge
in the luxury of being offline? Turns out, seven out of 10
office workers in the United States feel overwhelmed by
35 information in the workplace, and more than two in five
say they are headed for a data “breaking point,” according
to a recently released Workplace Productivity Survey.
Mike Walsh, CEO of LexisNexis U.S. Legal Markets,
says there are a host of reasons we’re all on the information
40 brink: “exponential growth of the size of the information
‘haystack,’ the immensity and immediacy of digital
communications, and the fact that professionals are not
being provided with sufficient tools and training to help
them keep pace with the growing information burden.”
45 ___ Ellen Kossek, a professor from Michigan State, believes
we are less productive in this age of 24-7 technology, and
our multitasking mentality has spawned a “not-mentallypresent”
society. “We’re becoming an attention-deficit
disorder society switching back and forth like crazy,”
50 Kossek says. “We’re connected all the time. We’re
working on planes, in coffee shops, working on the
weekends. Work is very seductive, but yet we’re actually
less effective.”
The key to getting your head above the data flood,
55 according to workplace experts, is managing and reducing
the information you’re bombarded with.
© 2008 MSNBC Interactive - (slightly adapted)
http://www.msnbc.msn.com/id/23636252/
When Shaun Osher affirms that "… the pendulum has swung way too much to the other side," (lines 23-24), he means that
In "One person could handle an issue that should take two minutes," (lines 14-15), "handle" means "to deal with". Mark the sentence in which the word "handle" is used in the same way.
How to dig out from the information avalanche
Majority of workers feel overwhelmed by deluge of data, survey finds
By Eve Tahmincioglu
updated 8:18 p.m. ET March 16, 2008
Don’t expect Shaun Osher, the CEO of Core Group
Marketing in New York, to answer your e-mail right away.
He has stopped responding to e-mails every minute and
only checks his e-mail account twice a day. He also started
5 turning off his BlackBerry during meetings.
This tactic has made him so much more productive
that earlier this year he held a meeting with his staff of 50
and “strongly suggested” that they stop relying so heavily
on e-mail and actually start calling clients on the phone.
10 And, he requested his employees put cell phones and
PDAs on silent mode during meetings, as well as curtail
the common practice of cc-ing everybody when sending
out an e-mail. “There was so much redundancy, so much
unnecessary work,” he explains. “One person could handle
15 an issue that should take two minutes, but when an email
goes out and five people get cc-ed, then everybody
responds to it and there’s a snowball effect.”
It’s not that Osher has anything against technology. In
fact, he loves it. The problem is, last year he realized he
20 was inundated with so many e-mails and so much
information in general that he began to experience data
overload. “In the beginning, e-mail and all this data was a
great phenomenon, revolutionizing what we do. But the
pendulum has swung way too much to the other side,” he
25 maintains. “We’re less productive.”
Osher isn’t the only one out there under a data
avalanche. Thanks to technological innovations, you can
be talking to a customer on your cell phone, answering a
LinkedIn invitation on your laptop, and responding to email
30 on your PDA all at the same time. Besides, during
tough economic times, who will want to miss any
information when your job could be on the line if you indulge
in the luxury of being offline? Turns out, seven out of 10
office workers in the United States feel overwhelmed by
35 information in the workplace, and more than two in five
say they are headed for a data “breaking point,” according
to a recently released Workplace Productivity Survey.
Mike Walsh, CEO of LexisNexis U.S. Legal Markets,
says there are a host of reasons we’re all on the information
40 brink: “exponential growth of the size of the information
‘haystack,’ the immensity and immediacy of digital
communications, and the fact that professionals are not
being provided with sufficient tools and training to help
them keep pace with the growing information burden.”
45 ___ Ellen Kossek, a professor from Michigan State, believes
we are less productive in this age of 24-7 technology, and
our multitasking mentality has spawned a “not-mentallypresent”
society. “We’re becoming an attention-deficit
disorder society switching back and forth like crazy,”
50 Kossek says. “We’re connected all the time. We’re
working on planes, in coffee shops, working on the
weekends. Work is very seductive, but yet we’re actually
less effective.”
The key to getting your head above the data flood,
55 according to workplace experts, is managing and reducing
the information you’re bombarded with.
© 2008 MSNBC Interactive - (slightly adapted)
http://www.msnbc.msn.com/id/23636252/
The purpose of this article is to
SOCIEDADE DA INFORMAÇÃO E EDUCAÇÃO
Costuma-se definir nossa era como a era do conhecimento.
Se for pela importância dada hoje ao conhecimento,
em todos os setores, pode-se dizer que se vive
mesmo na era do conhecimento, na sociedade do
5 conhecimento, sobretudo em conseqüência da
informatização e do processo de globalização das
telecomunicações a ela associado. Pode ser que, de fato,
já se tenha ingressado na era do conhecimento, mesmo
admitindo que grandes massas da população estejam
10 excluídas dele. Todavia, o que se constata é a predominância
da difusão de dados e informações e não de
conhecimentos. Isso está sendo possível graças às
novas tecnologias que estocam o conhecimento, de
forma prática e acessível, em gigantescos volumes de
15 informações, que são armazenadas inteligentemente,
permitindo a pesquisa e o acesso de maneira muito
simples, amigável e flexível. É o que já acontece com a
Internet: para ser “usuário”, basta dispor de uma linha
telefônica e um computador. “Usuário” não significa aqui
20 apenas receptor de informações, mas também emissor
de informações. Pela Internet, a partir de qualquer sala
de aula do planeta, podem-se acessar inúmeras bibliotecas
em muitas partes do mundo. As novas tecnologias
permitem acessar conhecimentos transmitidos não apenas
25 por palavras, mas também por imagens, sons, fotos,
vídeos (hipermídia), etc. Nos últimos anos, a informação
deixou de ser uma área ou especialidade para se tornar
uma dimensão de tudo, transformando profundamente a
forma como a sociedade se organiza. Pode-se dizer que
30 está em andamento uma Revolução da Informação, como
ocorreram no passado a Revolução Agrícola e a Revolução
Industrial. (...)
As novas tecnologias criaram novos espaços do
conhecimento. Agora, além da escola, também a
35 empresa, o espaço domiciliar e o espaço social tornaram-se
educativos. (...) Esses espaços de formação têm tudo
para permitir maior democratização da informação e do
conhecimento, portanto, menos distorção e menos
manipulação, menos controle e mais liberdade.(...)
40 ___ O conhecimento é o grande capital da humanidade.
Não é apenas o capital da transnacional que precisa dele
para a inovação tecnológica. Ele é básico para a sobrevivência
de todos e, por isso, não deve ser vendido ou comprado,
mas sim disponibilizado a todos. Esta é a função
45 de instituições que se dedicam ao conhecimento
apoiado nos avanços tecnológicos. Espera-se que a educação
do futuro seja mais democrática, menos excludente.
Essa é ao mesmo tempo nossa causa e nosso desafio.
Infelizmente, diante da falta de políticas públicas no
50 setor, acabaram surgindo “indústrias do conhecimento”,
prejudicando uma possível visão humanista, tornando-o
instrumento de lucro e de poder econômico.(...)
Neste contexto de impregnação do conhecimento,
cabe à escola: amar o conhecimento como espaço
55 de realização humana, de alegria e de contentamento
cultural; selecionar e rever criticamente a informação;
formular hipóteses; ser criativa e inventiva (inovar); ser
provocadora de mensagens e não pura receptora; produzir,
construir e reconstruir conhecimento elaborado.
60 E mais: numa perspectiva emancipadora da educação, a
escola tem que fazer tudo isso em favor dos excluídos,
não discriminando o pobre. Ela não pode distribuir poder,
mas pode construir e reconstruir conhecimentos, saber,
que é poder. Numa perspectiva emancipadora da educação,
65 a tecnologia contribui muito pouco para a emancipação
dos excluídos se não for associada ao exercício da
cidadania.(...)
Em geral, temos a tendência de desvalorizar o que
fazemos na escola e de buscar receitas fora dela quando
70 é ela mesma que deveria governar-se. É dever dela ser
cidadã e desenvolver na sociedade a capacidade de
governar e controlar o desenvolvimento econômico e o
mercado. A cidadania precisa controlar o Estado e o
mercado, verdadeira alternativa ao capitalismo neoliberal
75 e ao socialismo burocrático e autoritário. A escola precisa
dar o exemplo, ousar construir o futuro. Inovar é mais
importante do que reproduzir com qualidade o que existe.
A matéria-prima da escola é sua visão do futuro.(...)
GADOTTI, Moacir. Disponível em http://www.scielo.br/scielo.php?
Acesso em abr 2008
Conforme o texto, é INCORRETO afirmar que "ser cidadão" é
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