# Confidence Interval for Mean Difference& F-statistic P-value

Inferences concerning the mean difference using two dependent samples, two independent samples, and proportions.

A.

Before 93 106 87 92 102 95 88 110

After 92 102 89 92 101 96 88 105

a. What is the point estimate for the mean reduction in the diastolic reading?

b. Find the 98% confidence interval for the mean reduction.

B. On this scale, high scores indicate high anxiety concerning death. The results were reported as follows.

N mean Std Dev

Organ Donors 25 5.36 2.91

Non-organ Donors 69 7.62 3.45

A. Construct the 95% confidence interval for the difference between the means, Unon -- Udonor

C.

Calculate the estimate for the standard error of the difference between two proportions for each of the following cases:

a. n1=40 p'1=0.8, n2= 50, and p'2= 0.8

b. n1= 33 p'1= 0.6, n2= 38, and p'2= 0.65

D.

Find the p-value for each of the following situations:

a. F* = 3.852, df(factor) = 3, df(error) = 12

b. F* = 4.152, df(factor) = 5, df(error) = 18

c. F* = 4.572, df (factor) = 5, df(error) = 22

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#### Solution Summary

The solution provides step by step method for the calculation of confidence interval for paired difference and p-value corresponding to F-statistic. Formula for the calculation and Interpretations of the results are also included.