A sociologist found that in a sample of 50 retired men, the average number of jobs they
Question:
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.
a. Find the best point estimate of the mean.
b. Find the 95% confidence interval of the mean number of jobs.
c. Find the 99% confidence interval of the mean number of jobs.
d. Which is smaller? Explain why.
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a X 72 is the point estimate for b 72 19621 50 72 196 21 5...View the full answer
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