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A researcher is evaluating whether a new intervention affects the average reported anxiety symptoms in a...

A researcher is evaluating whether a new intervention affects the average reported anxiety symptoms in a sample of 49 college students. A survey from the previous semester found that the population reported a mean anxiety score of 22 with a standard deviation of 8. The sample completes the same measure of anxiety, with an average score of 20. The researcher sets their alpha level at .05 and performs a two-tailed test to determine whether anxiety increases or decreases after the intervention. Which response would best summarize the alternative hypothesis?

μpost-intervention = μpre-intervention

μpost-intervention > μpre-intervention

μpost-intervention < μpre-intervention

μpost-intervention ≠ μpre-intervention
math   Statistics-And-Probability   
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Answer #1

Below are the null and alternative Hypothesis,
Null Hypothesis, H0: μ1 = μ2
Alternative Hypothesis, Ha: μ1 ≠ μ2

μpost-intervention ≠ μpre-intervention
Option D

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