Number of Jobs A sociologist found that in a sample of 45 retired men, the average number of jobs they had during their lifetimes was 7.1. The population standard deviation is 2.2. Part: 0 / 4 Part 1 of 4 (a) Find the best point estimate of the mean. The best point estimate of the mean is 7.1 Part: 1/ 4 Part 2 of 4 (b) Find the 95% confidence interval of the mean number of jobs. Round intermediate and final answers to one decimal place. 0< u<0 Part: 2/ 4 Part 3 of 4 (cC) Find the 90% confidence interval of the mean number of jobs. Round intermediate and final answers to one decimal place. 0|

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