7.2.6-T
Question Help
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value tα/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 99%, the population standard deviation is not known, and the histogram of player salaries (in thousands of dollars) of football players on a team is as shown:
4000 8000 12000 16000 20000 Salary (thousands of dollars)
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. tα/2 (Round to two decimal places as needed:)
B. Zα/2 (Round to two decimal places as needed:)
C. Neither the normal distribution nor the t distribution applies