A sociologist found that in a sample of 50 retired men, the average number of jobs they had during their lifetimes was 7.2. The population standard deviation is 2.1.

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A sociologist found that in a sample of 50 retired men, the
average number of jobs they had during their lifetimes was
7.2. The population standard deviation is 2.1.
Transcribed Image Text:A sociologist found that in a sample of 50 retired men, the average number of jobs they had during their lifetimes was 7.2. The population standard deviation is 2.1.
Find the 99% confidence interval of the mean
number of jobs.
nswer
Choose a match
O
O
0.7662
2.58
6.43< <7.97
6.7 < μ <7.7
1.65
2.1
Transcribed Image Text:Find the 99% confidence interval of the mean number of jobs. nswer Choose a match O O 0.7662 2.58 6.43< <7.97 6.7 < μ <7.7 1.65 2.1
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