Question

A political candidate has asked his/her assistant to conduct a poll to determine the percentage of people in the community that supports him/her. If the candidate wants a 4% margin of error at a 99% confidence level, what size of sample is needed? Be sure to round accordingly. The candidate would need to survey ? people in the community in order to be within a 4% margin of error at a 99% confidence level.

Name: a political candidate has asked hisher assistant to conduct a poll to determine the percentage of people in the community that supports himher if the candidate wants a 4 margin of error at a 56813
Uploaded: 2022-07-29T12:37:16-08:00
Duration: 2 min 20 s
Channel: Christopher Dzorkpata
Description: a political candidate has asked hisher assistant to conduct a poll to determine the percentage of people in the community that supports himher if the candidate wants a 4 margin of error at a 56813

          A political candidate has asked his/her assistant to conduct a
poll to determine the percentage of people in the community that
supports him/her. If the candidate wants a 4% margin of error at a
99% confidence level, what size of sample is needed? Be sure to
round accordingly. The candidate would need to survey
?
people in the community in order to be within a 4% margin of
error at a 99% confidence level.

Added by Brandi H.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Christopher Dzorkpata

07/29/2022

Step 1

Given that alpha = 1 - 0.99 = 0.01, divide by 2 to get 0.005. Looking up this value in the z-table gives a z-value of 2.576. Show more…

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A political candidate has asked his/her assistant to conduct a poll to determine the percentage of people in the community that supports him/her. If the candidate wants a 4% margin of error at a 99% confidence level, what size of sample is needed? Be sure to round accordingly. The candidate would need to survey ? people in the community in order to be within a 4% margin of error at a 99% confidence level.