Confidence Interval for Estimating the Mean Weight Change Using the same paired sample data in Table 9-1, construct a 95% confidence interval estimate of μd .which is the mean of the “April–September” weight differences of college students in their freshman year.
Table 9-1 Weight (kg) Measurements of Students in Their Freshman Year
April weight
66
52
68
69
71
September weight
67
53
64
71
70
Difference d = (April weight) – (September weight)
-1
-1
4
-2
1