# 7.2 STATISTICS HOMEWORK - ESTIMATING A POPULATION MEAN

Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value α/2, (b) find the critical value zα/2, or (c) state that neither the normal distribution nor the t distribution applies.

The confidence level is

90%, σ is not known, and the normal quantile plot of the 17 salaries (in thousands of dollars) of basketball players on a team is as shown.

The confidence level is

90%, σ is not known, and the normal quantile plot of the 17 salaries (in thousands of dollars) of basketball players on a team is as shown.

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