At a certain American university, the average attendance at basketball games has been 2,700 spectators per game.The attendance for the first 16 games has been 2,450 spectators per game with a standard
Deviation of 550.The athletic director claims that the attendance is the same as last year.If what
Are the critical values?

Question

At a certain American university, the average attendance at basketball games has been 2,700 spectators per game.The attendance for the first 16 games has been 2,450 spectators per game with a standard
Deviation of 550.The athletic director claims that the attendance is the same as last year.If  what
Are the critical values?

Quizplus · Accepted Answer

Since we are testing if the attendance is the same as last year, this is a two-tailed test with a significance level (alpha) of 0.05. 
Using a t-distribution with 15 degrees of freedom (16 games - 1), we can find the critical values by inputting a probability of 0.025 (0.05/2) and 15 degrees of freedom into a t-table (or calculator). 
The critical values are -2.131 and 2.131, which corresponds to answer choice B (11ebb61d_fc03_b414_92a9_8391ecc011f6_TB8376_11).

At a Certain American University, the Average Attendance at Basketball