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. What is the best point estimate of the mean?
help?
The best point-estimate for the mean of a population is the mean of the sample.
Since the mean of the sample is 7.2, the best point-estimate for the population is also 7.2.
