Question 1182684: 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 90%, σ = 3952 thousand dollars, and the histogram of 53 player salaries (in thousands of dollars) of football players on a team is as shown.
Select the correct choice below and, if necessary, fill in the blank 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.
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! because sigma is given, use a z-test, and z (0.95)=1.645. I am assuming this based on not seeing the histogram. Should the histogram show a great deal of skewness, especially regarding salaries, the normality assumption may not be valid.
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