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In: Statistics and Probability

A physical therapist wants to determine the difference in the proportion of men and women who...

A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample size should be obtained if he wishes the estimate to be within two percentage points with 99 % confidence, assuming that

(a) hehe uses the estimates of 22.4 % male and 18.5 % female from a previous year?

(b) he does not use any prior estimates?

Solutions

Expert Solution

Refer Standard normal table/Z-table or use excel function "=NORM.S.INV((1-0.005))" to find the critical value of z.

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orchestra answered 2 years ago
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