Question

A pollster wants to construct a 90% confidence interval for the proportion of adults who believe that economic condition are getting better. ? A Gallup poll estimate this proportion to be 0.35. using this estimate what sample size is needed so that the confidence interval will have a margin of error of 0.03 B Estimate the sample size needed if no estimate of p is available.

Name: a pollster wants to construct a 90 confidence interval for the proportion of adults who believe that economic condition are getting better a gallup poll estimate this proportion to be 035 using this e
Uploaded: 2023-05-10T02:10:49-08:00
Duration: 1 min 43 s
Channel: Qudsiya Anis
Description: a pollster wants to construct a 90 confidence interval for the proportion of adults who believe that economic condition are getting better a gallup poll estimate this proportion to be 035 using this e

          A pollster wants to construct a 90% confidence interval for the proportion of adults who believe that economic  condition are getting better. ?

A Gallup poll estimate this proportion to be 0.35. using this estimate  what sample size is needed so that the confidence interval will have a margin of error of 0.03

B Estimate the sample size needed if no estimate of p is available.

Added by Cheryl T.

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Solved by Expert Qudsiya Anis

05/10/2023

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We want to construct a 90% confidence interval for the proportion of adults who believe that economic conditions are getting better. The margin of error (ME) is given as 0.03. Show more…

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A pollster wants to construct a 90% confidence interval for the proportion of adults who believe that economic condition are getting better. ? A Gallup poll estimate this proportion to be 0.35. using this estimate what sample size is needed so that the confidence interval will have a margin of error of 0.03 B Estimate the sample size needed if no estimate of p is available.