2. Suppose you conducted a study to determine if practicing yoga regularly reduc

Question

2. Suppose you conducted a study to determine if practicing yoga regularly reduces anxiety. So you had a sample of participants enroll in a 6-week yoga class and measured their anxiety before and after the study period using the Hamilton Anxiety Rating Scale (a well-established measurement survey, where higher scores indicate higher levels of anxiety) a. State the appropriate null and alternative hypotheses for this study. (O.5pt) b. If you test resulted in a p-value of 0.02, what would be your conclusion? (0.5pt) c. List a possible confounding variable and briefly describe what impact it might have had on the study results.(Ipt)

Explanation / Answer

a) Null: Practicing yoga regularly doesn't reduce anxiety

Alt: Practicing yoga regularly reduces anxiety

b) p = 0.02

A small p-value (typically 0.05) indicates strong evidence against the null hypothesis, so you reject the null hypothesis. A large p-value (> 0.05) indicates weak evidence against the null hypothesis, so you fail to reject the null hypothesis.

So, if we take alpha = 0.05 then here as p < alpha, null is rejected

which means there is enough evidence that Practicing yoga regularly reduces anxiety.

c) A confounding variable is an outside influence that changes the effect of a dependent and independent variable.

Age could be a confounding variable here. According to different ages of people yoga could have different effects on different people.

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