Researchers were interested in whether relaxation training decreases the number
ID: 3059727 • Letter: R
Question
Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. They randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. Which statistical analysis would we perform to compare the two group means and answer the researchers' question?
single-sample t test
z test
independent-samples t test
paired-samples t test
a.single-sample t test
b.z test
c.independent-samples t test
d.paired-samples t test
Explanation / Answer
The statistical analysis that need to be performed in paired-sample test.
This is because the study group for two treatment is same of 20 participants which selected at random for a control group. And the treatment results are mentioned before and after for the same group.
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