We have given the numbers of successes and the sample sizes for simple random samples for independent
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We have given the numbers of successes and the sample sizes for simple random samples for independent random samples from two populations. In each case,
a. Use the two-proportions plus-four z-interval procedure to find the required confidence interval for the difference between the two population proportions.
b. Compare your result with the corresponding confidence interval.
x1 =14, n1 =20, x2 =8, n2 =20; 90% confidence interval
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