A concern of Major League Baseball is that games last too long. Some executives in the league's headquarters believe that the mean length of games this past year exceeded 3 hours (180 minutes). To test this, the league selected a random sample of 80 games and found the following results: = 193 minutes and s = 16 minutes. Based on these results, if the null hypothesis is tested using an alpha level equal to 0.10, which of the following is true?
A) The null hypothesis should be rejected if
B) The test statistic is t=1.2924.
C) Based on the sample data, the null hypothesis cannot be rejected.
D) It is possible that when the hypothesis test is completed, a Type II statistical error has been made.

Question

A concern of Major League Baseball is that games last too long. Some executives in the league's headquarters believe that the mean length of games this past year exceeded 3 hours (180 minutes). To test this, the league selected a random sample of 80 games and found the following results: = 193 minutes and s = 16 minutes. Based on these results, if the null hypothesis is tested using an alpha level equal to 0.10, which of the following is true? 
A) The null hypothesis should be rejected if 
B) The test statistic is t=1.2924. 
C) Based on the sample data, the null hypothesis cannot be rejected. 
D) It is possible that when the hypothesis test is completed, a Type II statistical error has been made.

Quizplus · Accepted Answer

The Answer of A concern of Major League Baseball is that games last too long. Some executives in the league's headquarters believe that the mean length of games this past year exceeded 3 hours (180 minutes). To test this, the league selected a random sample of 80 games and found the following results: = 193 minutes and s = 16 minutes. Based on these results, if the null hypothesis is tested using an alpha level equal to 0.10, which of the following is true? 
A) The null hypothesis should be rejected if 
B) The test statistic is t=1.2924. 
C) Based on the sample data, the null hypothesis cannot be rejected. 
D) It is possible that when the hypothesis test is completed, a Type II statistical error has been made.

A Concern of Major League Baseball Is That Games Last