In a recent poll of 800 randomly selected adults, a president's approval rating stood at 48%. a) Make a 95% confidence interval for his approval rating by all adults in the country b) Based on the confidence interval, test the null hypothesis that 48% of the country approved of the way he was handling his job at that time a) Find the 95% confidence interval as a true proportion O(Round to three decimal places as needed.)

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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In a recent poll of 800 randomly selected adults, a president's approval rating stood at 48%.
a) Make a 95% confidence interval for his approval rating by all adults in the country
b) Based on the confidence interval, test the null hypothesis that 48% of the country approved of the way he was handling his job at that time.
a) Find the 95% confidence interval as a true proportion.
(Round to three decimal places as needed.)
Transcribed Image Text:In a recent poll of 800 randomly selected adults, a president's approval rating stood at 48%. a) Make a 95% confidence interval for his approval rating by all adults in the country b) Based on the confidence interval, test the null hypothesis that 48% of the country approved of the way he was handling his job at that time. a) Find the 95% confidence interval as a true proportion. (Round to three decimal places as needed.)
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