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test statist be 5% leve

test statist be 5% leve

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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25. A 2012 Gallup poll asked a random sample of 120 American adults whether they thought the news media exaggerate the seriousness of global warming. The proportion who responded “No" was 59.2%. Is this good evidence that majority of American adults do not believe the news media exaggerate the seriousness of the global warning? a) Set up appropriate null and alternative hypothesis to answer the above question. b) Calculate the value of the test statistic. c) Is the data significant at the 5% level (alpha = 0.05)? Explain why or why not. %3D d) State your conclusion in the context of the question above.
Transcribed Image Text:25. A 2012 Gallup poll asked a random sample of 120 American adults whether they thought the news media exaggerate the seriousness of global warming. The proportion who responded “No" was 59.2%. Is this good evidence that majority of American adults do not believe the news media exaggerate the seriousness of the global warning? a) Set up appropriate null and alternative hypothesis to answer the above question. b) Calculate the value of the test statistic. c) Is the data significant at the 5% level (alpha = 0.05)? Explain why or why not. %3D d) State your conclusion in the context of the question above.
4) A firm would like to estimate the mean age of all people in the civilian labor force. What size sample would be required to estimate the mean age of all people in the civilian labor force accurate to within 0.75 year of the estimate at the 95% confidence level, given that o = 15.26 years?
Transcribed Image Text:4) A firm would like to estimate the mean age of all people in the civilian labor force. What size sample would be required to estimate the mean age of all people in the civilian labor force accurate to within 0.75 year of the estimate at the 95% confidence level, given that o = 15.26 years?
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