Of n1 randomly selected male smokers, X1 smoked filter cigarettes, whereas of n2 randomly selected female smokers,
Question:
a. Show that (X1/n1) 2 (X2/n2) is an unbiased estimator for p1 - p2.
b. What is the standard error of the estimator in part (a)?
c. How would you use the observed values X1 and X2 to estimate the standard error of your estimator?
d. If n1 = n2 = 200, X1 = 127, and X2 = 176, use the estimator of part (a) to obtain an estimate of p1 - p2.
e. Use the result of part (c) and the data of part (d) to estimate the standard error of the estimator.
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Related Book For
Probability And Statistics For Engineering And The Sciences
ISBN: 9781305251809
9th Edition
Authors: Jay L. Devore
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