Using Correct Distribution. In Exercise, assume that we

QUESTION:

Using Correct Distribution. In Exercises 5–8, assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) Find the critical value \(\mathrm t\ \alpha\ /\ 2\) , (b) find the critical value \(\mathrm z\ \alpha\ /\ 2\) , (c) state that neither the normal distribution nor the t distribution applies.

Confidence level is 99%, \(\sigma\) is not known, and the dotplot of a sample of 40 values of professional baseball player salaries is as shown below.

Equation Transcription:

Text Transcription:

t alpha / 2

z alpha / 2

sigma