Cooling down with a cold drink before exercise in the heat is believed to help an athlete perform. Researcher J. Dugas explored the difference between cooling down with an ice slurry (slushy) and with cold water. Ten male participants drank a flavored ice slurry and ran a treadmill in a controlled hot and humid environment. Days later, the same participants drank cold water and ran on a treadmill in the same hot and humid environment. The following table shows the times, in minutes, it took to fatigue on the treadmill for both the ice slurry and the cold water. Subject Cold Water 1 52 2 37 3 44 4 51 5 34 6 38 7 41 8 50 9 29 10 38 Ice Slurry 56, 43, 52, 58, 38, 45, 45, 58, 34, 44 find a 98% confidence interval for the differences between the mean times to fatigue on a treadmill in a hot and humid environment after cooling down with cold water and after cooling down with an ice slurry.
Cooling down with a cold drink before exercise in the heat is believed to help an athlete perform. Researcher J. Dugas explored the difference between cooling down with an ice slurry (slushy) and with cold water. Ten male participants drank a flavored ice slurry and ran a treadmill in a controlled hot and humid environment. Days later, the same participants drank cold water and ran on a treadmill in the same hot and humid environment. The following table shows the times, in minutes, it took to fatigue on the treadmill for both the ice slurry and the cold water.
Subject Cold Water
-
1 52
-
2 37
-
3 44
-
4 51
-
5 34
-
6 38
-
7 41
-
8 50
-
9 29
-
10 38
Ice Slurry 56, 43, 52, 58, 38, 45, 45, 58, 34, 44
find a 98% confidence interval for the differences between the mean times to fatigue on a treadmill in a hot and humid environment after cooling down with cold water and after cooling down with an ice slurry.
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