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.

Q: please explaine how to get 42?

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A: (d) We are given that (x, y) ∈ R if and only if            x ≡ y (mod 7)       Now, it is obvious…

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Q: Please write it out with pen and paper

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A: 22)

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Q: R 22 Y 26 O RS = 18 %3D O RS = 24 %3D O RS = 20 O RS = 16 %3D

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A: The given function is y=xx4+4

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.