Heart rates are determined before and 30 minutes after a Kettleball workout. It can be assumed that heart rates (bpm) are normally distributed. Use the data provided below to test to determine if...

Heart rates are determined before and 30 minutes after a Kettleball workout. It can be assumed that heart rates (bpm) are normally distributed. Use the data provided below to test to determine if average heart rates prior to the workout are significantly lower than 30 minutes after a Kettleball workout at the 0.05 level of significance. Let pi = mean before workout.
before 75 80 64 62 71 64 after 82 80 66 67 70 69
Construct the appropriate confidence interval for the given level of significance.
(
[three decimal accuracy] [three decimal accuracy]
)