Question: A recent study of 20 individuals found that the average number of therapy sessions a person takes for a shoulder problem is 9.6. The standard

A recent study of 20 individuals found that the average number of therapy sessions a person takes for a shoulder problem is 9.6. The standard deviation of the sample was 2.8. A study of 25 individuals with a hip problem found that they had a mean of 10.3 sessions. The standard deviation for this sample was 2.3. At α = 0.01, is there a significant difference in the means?

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