Question

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
x̄1 = 110 ...... x̄2 = 130
a. Test H0: (p1 - p2) = 0 against Ha: (p1 - p2) < 0. Use α = .10.
b. Form a 95% confidence interval for (p1 - p2).
c. What sample sizes would be required if we wish to use a 95% confidence interval of width .01 to estimate (p1 - p2)?


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  • CreatedMay 20, 2015
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