Mathematics, 20.05.2021 22:00 Kling1982
Scientists wanted to test whether regular exercise can help increase sleep duration
They randomized 180 sedentary male volunteers who don't regularly exercise between a treatment group and a
control group. The treatment group was instructed to perform aerobic exercise for about an hour per day over a
period of 10 weeks, and the control group was instructed to continue with their exercise-less routine. The sleep
duration of each subject was measured (in minutes) just before and right after the treatment period.
The results of the experiment showed that the mean change in sleep duration of the treatment group is 50
minutes greater than the mean change of the control group. To test whether the results could be explained by
random chance, the researchers created the table below, which summarizes the results of 1000 re-
randomizations of the data (with differences between means rounded to the nearest 10 minutes).
According to the simulations, what is the probability of the treatment group's mean being higher than the
control group's mean by 50 minutes or more?
Assume that if the probability you found is lower than 5%, then the result should be considered significant
Answers: 3
Mathematics, 21.06.2019 14:30
Fiona and her friends are playing a game by guessing where a coin will land when it is randomly dropped inside the square shown below. fiona guesses that the coin is likely to land in the blue area. which explains whether or not fiona is correct and why?
Answers: 1
Mathematics, 22.06.2019 03:00
Based on the spreadsheet below, which of the following is a true statement?
Answers: 2
Mathematics, 22.06.2019 03:00
Step by step explanation pls for 10 pts the length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?
Answers: 1
Scientists wanted to test whether regular exercise can help increase sleep duration
They randomized...
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