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Wishing to test the effectiveness of practicing yoga to reduce stress, a group of researchers conducted an experiment on a group of 100 volunteers at a local college.
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All 100 participants took a stress test, rating 1 from 10, at the beginning of the experiment.
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And they believe that women tend to have more experience with and enjoy yoga.
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The researchers split the volunteers up by gender.
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There were 30 men, there were 70 women.
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15 of the men and 35 of the women are randomly assigned to take one -hour yoga classes two times a week.
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And the total of this experiment ran six weeks.
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The other participants were instructed not to do yoga over those six weeks, and all four groups were told to otherwise continue their normal routines.
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After the six weeks, all participants took.
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Took the stress test again.
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For each participant, the change of stress was calculated.
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The researchers compared the average change in stress among women who practiced the yoga with women who did not, and the average change in stress among men who practiced yoga with the men who did not.
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They then compared the average differences in stress among the men to the average differences of stress among the women.
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And we want to dissect this experiment.
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So first thing is, we wanted to identify the explanatory and response variables.
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So let's do some vocabulary here.
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The explanatory variable is the variable that explains change.
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And the response variable is the focus of a question in a study or an experiment.
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So therefore, our explanatory variable is going to be the yoga practice and the stress level will be our response variable because we're trying to focus on whether stress is alleviated or improves by taking yoga.
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So we'll come down here and we'll grab the two.
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So our stress level is our response and our yoga practice is your explanatory.
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We want to know what are the treatments.
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So what did we do with the groups? so our treatments are going to be the one -hour yoga class for some of them and no yoga for others...