Just need help with part 3, thank you!

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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Just need help with part 3, thank you!
Number of Jobs A sociologist found that in a sample of 49 retired men, the average number of jobs they had during their lifetimes was 6.8. The population
standard deviation is 2.4. Use a graphing calculator and round the answers to one decimal place.
Part 1 of 4
The best point estimate of the mean is 6.8
Part 2 of 4
Find the 91% confidence interval of the mean number of jobs.
6.22 <u< 7.38
Part: 2 / 4
Part 3 of 4
Find the 95% confidence interval of the mean number of jobs.
Transcribed Image Text:Number of Jobs A sociologist found that in a sample of 49 retired men, the average number of jobs they had during their lifetimes was 6.8. The population standard deviation is 2.4. Use a graphing calculator and round the answers to one decimal place. Part 1 of 4 The best point estimate of the mean is 6.8 Part 2 of 4 Find the 91% confidence interval of the mean number of jobs. 6.22 <u< 7.38 Part: 2 / 4 Part 3 of 4 Find the 95% confidence interval of the mean number of jobs.
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