Number of Jobs A sociologist found that in a sample of 55 retired men, the average number of jobs they had during their lifetimes was 7.1. The population standard deviation is 2.1
.(a) Find the best point estimate of the mean.
The best point estimate of the mean is 7.1
(b) Find the 95% confidence interval of the mean number of jobs. Round intermediate and final answers to one decimal place.
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