In your local high school, a random sample of 10 high school seniors participated in a course to increase their knowledge of healthy living activities. The students were given a knowledge quiz before and after the program. The scores are listed below. Calculate a twosided 95% confidence interval for the mean difference in the scores. Give an interpretation of the confidence interval. You MUST show your work
Student

Before

After

1

65

70

2

55

71

3

72

68

4

49

65

5

71

89

6

89

95

7

90

99

8

85

82

9

75

84

10

78

76

Stepbystep procedure to obtain the confidence interval using MINITAB:
Step 1: Choose Stat > Basic Statistics > Paired t.
Step 2: In First Sample, enter the column of Before.
Step 3: In Second Sample, enter the column of After.
Step 4: Choose Options.
Step 5: In Confidence level, enter 95.
Step 6: In Alternative, select not equal.
Step 7: Click OK in all the dialogue boxes.
Step 8: Click OK.
Output using the MINITAB sof...
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