Answer
Sample 1 underestimates the mean .
Sample 2 overestimates the mean.
Sample 3 mean is close to population mean.
Work Step by Step
Population mean is 26.4. Mean of sample 1 is 22.5, which is less than the population mean; hence, it underestimates the mean. Mean of sample 2 is 27.25, which is greater than the population mean, hence it overestimates the mean. Mean of sample 3 is 26, which is close to the population mean 26.4.
