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Find the test statistic for this hypothesis test. z= (Round to two decimal places as needed.)

Find the test statistic for this hypothesis test. z= (Round to two decimal places as needed.)

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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One of the more popular statistics reported in the media is the president's job approval rating. The approval rating is reported as the proportion of the population who approve of the job that the sitting president is doing and is typically based on a random sample of registered voters where the sample size is the same week to week. Complete parts (a) and (b) below. b) A poll showed the approval rating to be 0.47 (47%). A second poll based on 2000 randomly selected voters showed that 882 approved of the job the president was doing. Do the results of the second poll indicate that the proportion of voters who approve of the job the president is doing is significantly lower than the original level? Explain. Assume the a = 0.05 level of significance.
Transcribed Image Text:One of the more popular statistics reported in the media is the president's job approval rating. The approval rating is reported as the proportion of the population who approve of the job that the sitting president is doing and is typically based on a random sample of registered voters where the sample size is the same week to week. Complete parts (a) and (b) below. b) A poll showed the approval rating to be 0.47 (47%). A second poll based on 2000 randomly selected voters showed that 882 approved of the job the president was doing. Do the results of the second poll indicate that the proportion of voters who approve of the job the president is doing is significantly lower than the original level? Explain. Assume the a = 0.05 level of significance.
Find the test statistic for this hypothesis test. z= (Round to two decimal places as needed.)
Transcribed Image Text:Find the test statistic for this hypothesis test. z= (Round to two decimal places as needed.)
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