20. test statistic

Independent random samples taken on two university campuses revealed the following information concerning the average amount of money spent on textbooks during thefall semester.

University AUniversity B
Sample Size5040
Average Purchase$260$250
Standard Deviation (s)$20$ 23

We want to determine if, on the average, students at University A spent more on textbooks then the students at University B.
a. Compute the test statistic.
b. Compute the p-value.
c. What is your conclusion? Let a = .05.


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