A recent study of 20 individuals found that the average number of hours of physical therapy these persons required to recover from a knee replacement was 29.6 , with a standard deviation of 3.8. A separate study of 25 individuals found that the average number of P.T. hours people required to recover from a hip replacement surgery was 30.3 , with a standard deviation of 4.3 . Assume the population variances are not equal. At a = 0.02, test the claim that there is a statistically significant difference in the sample means. Show all steps of the hypothesis test You GenduGt.

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.