Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men and women who consume medication daily. Assume that you want 90% confidence that your error is no more than 0.025. a Click the icon to view the discussion of sample size. The samples should include (Type whole numbers.) men and women. Sample size discussion

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Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men
and women who consume medication daily. Assume that you want 90% confidence that your error is no more than 0.025.
a Click the icon to view the discussion of sample size.
The samples should include
(Type whole numbers.)
men and
women.
i
Sample size discussion
ha
The sample size needed to estimate the difference between two population
proportions to within a margin of error E with a confidence level of 1-a can be
found by using the following expression:
P191
P292
E= Z«/2
n2
Replace n, and n, by n in the preceding formula (assuming that both samples
have the same size) and replace each of p, , q,, P2, and q, by 0.5 (because their
values are not known). Solving for n results in this expression:
Za12
n =
2E?
Transcribed Image Text:Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men and women who consume medication daily. Assume that you want 90% confidence that your error is no more than 0.025. a Click the icon to view the discussion of sample size. The samples should include (Type whole numbers.) men and women. i Sample size discussion ha The sample size needed to estimate the difference between two population proportions to within a margin of error E with a confidence level of 1-a can be found by using the following expression: P191 P292 E= Z«/2 n2 Replace n, and n, by n in the preceding formula (assuming that both samples have the same size) and replace each of p, , q,, P2, and q, by 0.5 (because their values are not known). Solving for n results in this expression: Za12 n = 2E?
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