Question

1. The University offers supplemental instruction (SI) for Introductory Statistics students four times a week. The table below records the number of SI visits during the semester for a sample of students along with each student’s final exam grade. Use the appropriate statistical test to determine if it is beneficial to attend SI for help. All appropriate statistical procedures/tests should be done with 5% P-value or 95% Confidence Interval.

# of SI visits	2	8	10	9	15	7	5	4	8	10	7	7	5	4	4	11
Final exam grade	40	85	80	84	90	72	50	59	85	70	66	70	63	60	59	79

Click here for the SI-PA#3 data. (3 points)

# of SI visits  Final grade
2       40
8       85
10      80
9       84
15      90
7       72
5       50
4       59
8       85
10      70
7       66
7       70
5       63
4       60
4       59
11      79

• a. P-value = 2.94E-07. Since P < 0.05, there is significant evidence to state that attending SI is beneficial.
• b. P-value = 0.602. Since P > 0.05, the test is inconclusive. We do not have enough evidence to state that attending SI is beneficial.
• c. P-value = 3.42E-05. Since P < 0.05, there is significant evidence to state that attending SI is beneficial.
• d. P-value = 0.2529. Since P > 0.05, the test is inconclusive. We do not have enough evidence to state that attending SI is beneficial.
• e. None of the choices.

Answer 1