A recent survey revealed that out of 120 people, 87 were satisfied with the president's performance. a) Determine the point estimate of the proportion of people who are satisfied with the president's performance.b) Determine the 90% confidence interval for the population's proportion of people who agree with the president's c) To make a larger study, with 95% confidence and an estimation error of 3%, what should the sample size be?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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ISBN:9780079039897
Author:Carter
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Chapter4: Equations Of Linear Functions
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A recent survey revealed that out of 120 people, 87 were satisfied with the president's performance. 
a) Determine the point estimate of the proportion of people who are satisfied with the president's performance.
b) Determine the 90% confidence interval for the population's proportion of people who agree with the president's 
c) To make a larger study, with 95% confidence and an estimation error of 3%, what should the sample size be?

 
 

 

 

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