In order to determine whether or not a driver's education course improves the scores on a driving exam, a sample of 6 students were given the exam before and after taking the course. The results are shown below. Let d = Score After - Score Before.

Student 1. 2. 3. 4. 5. 6

Score Before the Course. 83 89. 93. 77. 86. 79

Score After the Course. 87. 88. 91. 77. 93. 83

Use= 0.1 and test to see if taking the course actually increased scores on the driving exam. The value of the test statistic is found to be equal to 1.3912. What is(are) the critical values of the test statistic?

Select one:

A.

1.476

B.

-1.28

C.

-1.476

D.

-1.28 to 1.28