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Q3758082 Estatística
Para avaliar o efeito de um tratamento, um pesquisador mediu uma variável em 35 unidades amostrais, antes e depois da intervenção. A análise da diferença entre os pares de medidas por meio de um teste t, para amostras pareadas, resultou em um pvalor = 0,021 e um intervalo de confiança de 95% para a diferença média de [0,8; 5,3].
Com base nesses resultados, a conclusão correta é que
Alternativas
Q3758081 Estatística
Um pesquisador aplicou um teste de normalidade em um conjunto de dados e obteve p-valor = 0,45. Considerando um nível de significância α = 0,05, ele precisa decidir qual teste estatístico usar para comparar médias de dois grupos independentes.
Uma decisão metodológica adequada nessa situação, dentre as apresentadas a seguir, é
Alternativas
Q3758080 Estatística
Um pesquisador interpretou os resultados de uma análise de correlação entre duas variáveis, Y e Z. O software estatístico forneceu os seguintes resultados:
27.jpg (278×132)
Sobre a interpretação desses resultados, analise as afirmativas:
I. Existe uma correlação linear negativa forte entre as variáveis Y e Z.
II. O resultado é estatisticamente significativo ao nível de 5%.
III. É correto concluir que a variável Y é a causa da variação observada na variável Z.
Está correto o que se afirma em
Alternativas
Q3758079 Estatística
Um pesquisador coletou dados sobre uma variável X em 100 amostras e observou que a distribuição apresentava assimetria positiva acentuada. Ao calcular as medidas de posição central, ele obteve os seguintes valores: média = 45, mediana = 38 e moda = 32.
Sobre a interpretação dessas informações, analise as afirmativas a seguir:
I. A ordem crescente das medidas de posição central (moda < mediana < média) é consistente com a assimetria positiva observada.
II. Para reduzir o efeito da assimetria, a mediana seria uma medida de tendência central mais adequada que a média para representar os dados.
III. A diferença observada entre os valores da média e da mediana sugere a presença de valores extremos (outliers) na cauda direita da distribuição.
Está correto o que se afirma em
Alternativas
Q3758078 Matemática
João e Maria fazem parte de um grupo de pesquisa. Sabe-se que 3 pessoas do grupo serão sorteadas para representarem o grupo em um evento. Todos os membros do grupo possuem a mesma probabilidade de serem sorteados, e a probabilidade de João e Maria estarem entre os três sorteados é igual 3/28. 
Quantas pessoas há no grupo?
Alternativas
Q3758077 Raciocínio Lógico
Em um dos setores de uma empresa de engenharia, há uma placa eletrônica de contagem regressiva que afirma “Nossa obra será finalizada daqui a 1531 dias.”.
Suponha que, daqui a 1 dia, seja quarta-feira.
Assim, o dia da semana previsto para a finalização da obra é 
Alternativas
Q3758076 Matemática
Considere P um polígono regular com 35 lados.
Um novo polígono regular Q, diferente de P, é tal que seus vértices também são vértices de P.
O maior número de lados que o polígono Q pode ter é
Alternativas
Q3758075 Raciocínio Lógico
Em um grupo formado por 11 pessoas, no máximo 5 pessoas não possuem doutorado, nem seguem uma carreira acadêmica.
Tal característica pode ser recolocada, de modo logicamente equivalente, pela seguinte assertiva:
Alternativas
Q3758073 Estatística
Durante a análise de séries temporais, um pesquisador propõe a hipótese de que determinadas condições da variável W influenciam positivamente a diversidade de elementos Z. Para testar essa hipótese de modo estatisticamente robusto, o objetivo metodológico mais adequado é
Alternativas
Q3758072 Hidrologia
Durante a revisão de um relatório técnico, um pesquisador observa que a tabela de resultados apresenta o título abaixo da tabela, omite as unidades de medida e substitui valores “não determinados” por zero.
Considerando as normas e boas práticas de comunicação científica, a forma correta de apresentação seria
Alternativas
Q3758071 Estatística
Para elaborar um mapa preliminar da distribuição de uma propriedade Y em uma área de 5 km², a equipe deve empregar um plano amostral exploratório.
A estratégia mais adequada é
Alternativas
Q3758070 Gerência de Projetos
Um grupo de pesquisadores planeja conduzir um estudo quantitativo de longo prazo, com o objetivo de identificar possíveis relações entre variáveis observadas em um sistema natural monitorado por cinco anos. O êxito do estudo depende de uma sequência metodológica coerente e aderente aos princípios da pesquisa científica.
Assinale a opção que apresenta a ordem lógica e tecnicamente adequada para o desenvolvimento do projeto.
Alternativas
Q3758069 Geologia
Um pesquisador, ao analisar dados de concentração de uma substância X em amostras coletadas em uma região de estudo, observa valores elevados em uma área específica, sem fontes aparentes na superfície. A anomalia coincide com uma zona onde estudos prévios identificaram condições geológicas favoráveis ao transporte de substâncias.
Assinale a opção que apresenta a formulação de uma hipótese de pesquisa científica válida e testável para explicar o fenômeno.
Alternativas
Q3758068 Inglês
Jadarite, described as ‘Earth's kryptonite twin,’ has potential to replace fossil fuels 

A plain-white mineral found in western Serbia has a name straight out of the comics and a chemical profile that battery makers crave. Called jadarite, also known as sodium-lithium- boron silicate hydroxide, was first pulled from drill cores in 2004 and officially recognized as a new mineral two years later. 

Geologists soon noticed that the formula on the sample label matched the faux “kryptonite” shown in a 2006 Superman film, minus the fluorine and the green glow. That pop-culture twist helped the discovery grab headlines, yet the real excitement lies in what the mineral could do for electric vehicles and renewable power storage.

Jadarite occurs as dull, chalky nodules tucked inside fine-grained shale in the Jadar Valley. The host rocks formed in an ancient lake basin rich in volcanic ash, allowing lithium and boron to build up in the pore waters until the mineral crystallized. Those conditions have been found only in Serbia so far, making the deposit both unique and strategically valuable. 

Michael Page, a process chemist at Australia’s Nuclear Science and Technology Organisation (ANSTO), points out that the valley “is considered one of the largest lithium deposits in the world, making it a potential game-changer for the global green energy transition.” […]

Serbian communities are not unanimous in welcoming the mine. Environmental groups warn that alkali-rich tailings could leak into the Jadar River and harm local agriculture. Independent studies have found elevated boron and lithium downstream of exploratory boreholes, fueling weekly protests in Belgrade.

Supporters counter that rigorous water-management plans and sealed tailings cells can limit impacts, and that the economic gains, including thousands of skilled jobs, are hard to ignore. European automakers also see the project as a chance to shorten supply chains now dominated by South American brines and Chinese refiners.

Whether or not the Jadar project reaches full production, the mineral has already altered the critical-minerals map. Its existence proves that lithium can concentrate outside traditional pegmatites and brines, broadening the hunt to basins once dismissed as uneconomic clay.

Researchers are now experimenting with synthetic pathways, seeding gels of silica, borate, and lithium under lake-like conditions to see if jadarite can be grown on demand. Success could pave the way for engineered deposits that bypass mining altogether. For now, though, nature’s one known batch in western Serbia remains the focus of intense scientific, industrial, and public scrutiny.

Adapted from https://www.earth.com/news/jadarite-described-as-earthskryptonite-twin-has-potential-to-replace-fossil-fuels/


Based on the last paragraph, analyse the assertions below:
I. Scientific experimentation might do away with the need for mining.
II. Currently, interest in jadarite deposits seems to be waning.
III. It is highly unlikely that the deposits found in Serbia will reshape the future of energy.
Choose the correct answer. 
Alternativas
Q3758067 Inglês
Jadarite, described as ‘Earth's kryptonite twin,’ has potential to replace fossil fuels 

A plain-white mineral found in western Serbia has a name straight out of the comics and a chemical profile that battery makers crave. Called jadarite, also known as sodium-lithium- boron silicate hydroxide, was first pulled from drill cores in 2004 and officially recognized as a new mineral two years later. 

Geologists soon noticed that the formula on the sample label matched the faux “kryptonite” shown in a 2006 Superman film, minus the fluorine and the green glow. That pop-culture twist helped the discovery grab headlines, yet the real excitement lies in what the mineral could do for electric vehicles and renewable power storage.

Jadarite occurs as dull, chalky nodules tucked inside fine-grained shale in the Jadar Valley. The host rocks formed in an ancient lake basin rich in volcanic ash, allowing lithium and boron to build up in the pore waters until the mineral crystallized. Those conditions have been found only in Serbia so far, making the deposit both unique and strategically valuable. 

Michael Page, a process chemist at Australia’s Nuclear Science and Technology Organisation (ANSTO), points out that the valley “is considered one of the largest lithium deposits in the world, making it a potential game-changer for the global green energy transition.” […]

Serbian communities are not unanimous in welcoming the mine. Environmental groups warn that alkali-rich tailings could leak into the Jadar River and harm local agriculture. Independent studies have found elevated boron and lithium downstream of exploratory boreholes, fueling weekly protests in Belgrade.

Supporters counter that rigorous water-management plans and sealed tailings cells can limit impacts, and that the economic gains, including thousands of skilled jobs, are hard to ignore. European automakers also see the project as a chance to shorten supply chains now dominated by South American brines and Chinese refiners.

Whether or not the Jadar project reaches full production, the mineral has already altered the critical-minerals map. Its existence proves that lithium can concentrate outside traditional pegmatites and brines, broadening the hunt to basins once dismissed as uneconomic clay.

Researchers are now experimenting with synthetic pathways, seeding gels of silica, borate, and lithium under lake-like conditions to see if jadarite can be grown on demand. Success could pave the way for engineered deposits that bypass mining altogether. For now, though, nature’s one known batch in western Serbia remains the focus of intense scientific, industrial, and public scrutiny.

Adapted from https://www.earth.com/news/jadarite-described-as-earthskryptonite-twin-has-potential-to-replace-fossil-fuels/


In the fourth paragraph, the process chemist’s opinion about the Jadar Valley is that it is
Alternativas
Q3758066 Inglês
Jadarite, described as ‘Earth's kryptonite twin,’ has potential to replace fossil fuels 

A plain-white mineral found in western Serbia has a name straight out of the comics and a chemical profile that battery makers crave. Called jadarite, also known as sodium-lithium- boron silicate hydroxide, was first pulled from drill cores in 2004 and officially recognized as a new mineral two years later. 

Geologists soon noticed that the formula on the sample label matched the faux “kryptonite” shown in a 2006 Superman film, minus the fluorine and the green glow. That pop-culture twist helped the discovery grab headlines, yet the real excitement lies in what the mineral could do for electric vehicles and renewable power storage.

Jadarite occurs as dull, chalky nodules tucked inside fine-grained shale in the Jadar Valley. The host rocks formed in an ancient lake basin rich in volcanic ash, allowing lithium and boron to build up in the pore waters until the mineral crystallized. Those conditions have been found only in Serbia so far, making the deposit both unique and strategically valuable. 

Michael Page, a process chemist at Australia’s Nuclear Science and Technology Organisation (ANSTO), points out that the valley “is considered one of the largest lithium deposits in the world, making it a potential game-changer for the global green energy transition.” […]

Serbian communities are not unanimous in welcoming the mine. Environmental groups warn that alkali-rich tailings could leak into the Jadar River and harm local agriculture. Independent studies have found elevated boron and lithium downstream of exploratory boreholes, fueling weekly protests in Belgrade.

Supporters counter that rigorous water-management plans and sealed tailings cells can limit impacts, and that the economic gains, including thousands of skilled jobs, are hard to ignore. European automakers also see the project as a chance to shorten supply chains now dominated by South American brines and Chinese refiners.

Whether or not the Jadar project reaches full production, the mineral has already altered the critical-minerals map. Its existence proves that lithium can concentrate outside traditional pegmatites and brines, broadening the hunt to basins once dismissed as uneconomic clay.

Researchers are now experimenting with synthetic pathways, seeding gels of silica, borate, and lithium under lake-like conditions to see if jadarite can be grown on demand. Success could pave the way for engineered deposits that bypass mining altogether. For now, though, nature’s one known batch in western Serbia remains the focus of intense scientific, industrial, and public scrutiny.

Adapted from https://www.earth.com/news/jadarite-described-as-earthskryptonite-twin-has-potential-to-replace-fossil-fuels/


In the fragment “a chemical profile that battery makers crave” (1st paragraph), the verb is close in meaning to
Alternativas
Q3758065 Inglês
Jadarite, described as ‘Earth's kryptonite twin,’ has potential to replace fossil fuels 

A plain-white mineral found in western Serbia has a name straight out of the comics and a chemical profile that battery makers crave. Called jadarite, also known as sodium-lithium- boron silicate hydroxide, was first pulled from drill cores in 2004 and officially recognized as a new mineral two years later. 

Geologists soon noticed that the formula on the sample label matched the faux “kryptonite” shown in a 2006 Superman film, minus the fluorine and the green glow. That pop-culture twist helped the discovery grab headlines, yet the real excitement lies in what the mineral could do for electric vehicles and renewable power storage.

Jadarite occurs as dull, chalky nodules tucked inside fine-grained shale in the Jadar Valley. The host rocks formed in an ancient lake basin rich in volcanic ash, allowing lithium and boron to build up in the pore waters until the mineral crystallized. Those conditions have been found only in Serbia so far, making the deposit both unique and strategically valuable. 

Michael Page, a process chemist at Australia’s Nuclear Science and Technology Organisation (ANSTO), points out that the valley “is considered one of the largest lithium deposits in the world, making it a potential game-changer for the global green energy transition.” […]

Serbian communities are not unanimous in welcoming the mine. Environmental groups warn that alkali-rich tailings could leak into the Jadar River and harm local agriculture. Independent studies have found elevated boron and lithium downstream of exploratory boreholes, fueling weekly protests in Belgrade.

Supporters counter that rigorous water-management plans and sealed tailings cells can limit impacts, and that the economic gains, including thousands of skilled jobs, are hard to ignore. European automakers also see the project as a chance to shorten supply chains now dominated by South American brines and Chinese refiners.

Whether or not the Jadar project reaches full production, the mineral has already altered the critical-minerals map. Its existence proves that lithium can concentrate outside traditional pegmatites and brines, broadening the hunt to basins once dismissed as uneconomic clay.

Researchers are now experimenting with synthetic pathways, seeding gels of silica, borate, and lithium under lake-like conditions to see if jadarite can be grown on demand. Success could pave the way for engineered deposits that bypass mining altogether. For now, though, nature’s one known batch in western Serbia remains the focus of intense scientific, industrial, and public scrutiny.

Adapted from https://www.earth.com/news/jadarite-described-as-earthskryptonite-twin-has-potential-to-replace-fossil-fuels/


In the second paragraph, the text informs that the discovery
Alternativas
Q3758064 Inglês
Jadarite, described as ‘Earth's kryptonite twin,’ has potential to replace fossil fuels 

A plain-white mineral found in western Serbia has a name straight out of the comics and a chemical profile that battery makers crave. Called jadarite, also known as sodium-lithium- boron silicate hydroxide, was first pulled from drill cores in 2004 and officially recognized as a new mineral two years later. 

Geologists soon noticed that the formula on the sample label matched the faux “kryptonite” shown in a 2006 Superman film, minus the fluorine and the green glow. That pop-culture twist helped the discovery grab headlines, yet the real excitement lies in what the mineral could do for electric vehicles and renewable power storage.

Jadarite occurs as dull, chalky nodules tucked inside fine-grained shale in the Jadar Valley. The host rocks formed in an ancient lake basin rich in volcanic ash, allowing lithium and boron to build up in the pore waters until the mineral crystallized. Those conditions have been found only in Serbia so far, making the deposit both unique and strategically valuable. 

Michael Page, a process chemist at Australia’s Nuclear Science and Technology Organisation (ANSTO), points out that the valley “is considered one of the largest lithium deposits in the world, making it a potential game-changer for the global green energy transition.” […]

Serbian communities are not unanimous in welcoming the mine. Environmental groups warn that alkali-rich tailings could leak into the Jadar River and harm local agriculture. Independent studies have found elevated boron and lithium downstream of exploratory boreholes, fueling weekly protests in Belgrade.

Supporters counter that rigorous water-management plans and sealed tailings cells can limit impacts, and that the economic gains, including thousands of skilled jobs, are hard to ignore. European automakers also see the project as a chance to shorten supply chains now dominated by South American brines and Chinese refiners.

Whether or not the Jadar project reaches full production, the mineral has already altered the critical-minerals map. Its existence proves that lithium can concentrate outside traditional pegmatites and brines, broadening the hunt to basins once dismissed as uneconomic clay.

Researchers are now experimenting with synthetic pathways, seeding gels of silica, borate, and lithium under lake-like conditions to see if jadarite can be grown on demand. Success could pave the way for engineered deposits that bypass mining altogether. For now, though, nature’s one known batch in western Serbia remains the focus of intense scientific, industrial, and public scrutiny.

Adapted from https://www.earth.com/news/jadarite-described-as-earthskryptonite-twin-has-potential-to-replace-fossil-fuels/


Based on the information provided by the text, mark the statements below as true (T) or false (F).
( ) Jadarite resembles to some extent a mineral previously depicted in fiction.
( ) Environmentalists support the Jadar project due to its harmless effects.
( ) Experimental work is underway to assess the possibility of producing the mineral upon request.
The statements are, respectively
Alternativas
Q3758063 Português
Assinale a opção em que as palavras estejam acentuadas adequadamente.
Alternativas
Respostas
341: B
342: A
343: B
344: E
345: D
346: A
347: D
348: C
349: B
350: A
351: D
352: A
353: C
354: B
355: A
356: E
357: B
358: D
359: C
360: D