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. 6.2 <μ< 7.4 Part: 2/4 Part 3 of 4 Find the 95% confidence interval of the mean number of jobs. <με x

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