Independent random samples were selected from two binomial populations. The size and number of observed successes for
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Independent random samples were selected from two binomial populations. The size and number of observed successes for each sample are shown in the following table.
Sample 1 Sample 2 n1 = 200 n2 = 200 x1 = 70 x2 = 90
a. Test H0: 1p1 - p22 = 0 against Ha: 1p1 - p22 6 0.
Use a = .10. LO3
b. Form a 95% confidence interval for 1p1 - p22.
c. What sample sizes would be required if we wish to use a 95% confidence interval of width .01 to estimate 1p1 - p22?
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