There has been a great deal of discussion about global warming in recent years. In 2006, the Pew Research Center conducted a survey of 1,501 Americans to assess their opinion of global warming. The data show 615 respondents of the 1,501 surveyed felt global warming is a very serious problem. 615 0.4091 (501 A. Estimate the proportion of all adult Americans who felt global warming is a very serious problem at the 95% confidence interval. b. Estimate the proportion of all adult Americans who felt global warming is a very serious problem at the 99% confidence interval. c. If you were going to write a report on this poll result, would you prefer to use the 99% c 95% confidence interval? Explain why.

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Q: Find the margin of error at a 90% confidence level.

A:

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A: https://drive.google.com/file/d/1S_b_En4yZMZPhsaGfBA2eE_M0IJFOVeW/view?usp=sharing

Q: If the alpha level is .05, then the confidence level is ?

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