A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity.
a. What sample size should be obtained if she wishes the estimate to be within two percentage points with 99% confidence, assuming that she uses the estimates of 22.9% male and 19.1% female from a previous year?
b. What sample size should be obtained if she wishes the estimate to be within two percentage points with 99% confidence, assuming that she does not use any prior estimates?
a) Given that, p1 = 0.229 and p2 = 0.191
margin of error ( E ) = 2% = 0.02
A 99% confidence level has significance level = 0.01 and critical value is,
We want to find, the sample size ( n ),
Therefore, required sample size is 5488
b) Assuming that she does not use any prior estimates.
So, p1 = p2 = 0.5 and sample size ( n ) is,
Therefore, required sample size is 8288
A physical therapist wants to determine the difference in the proportion of men and women who par...
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 she wishes the estimate to be within five percentage points with 99% confidence, assuming that (a) she uses the estimates of 22.3% male and 18.9% female from a previous year? (b) she does not use any prior estimates? (a) n = _______
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 she wishes the estimate to be within four percentage points with 99% confidence, assuming that (a) she uses the estimates of 22.1% male and 18.9% female from a previous year? (b) she does not use any prior estimates? (a) n= (Round up to the nearest whole number.)
11.1.40 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 she wishes the estimate to be within five percentage points with 99% confidence, assuming that (a) she uses the estimates of 22.6% male and 19.2% female from a previous year? (b) she does not use any prior estimates?
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 sheshe wishes the estimate to be within threethree percentage points with 90% confidence, assuming that a) she uses the estimates of 22.7% male and 18.1% female from a previous year? (b) she does not use any prior estimates?
A physical therapist wants to determine the difference in the proportion of men and women who participate in regularly sustained physical activity what sample size would be obtained if she wishes the estimate to be within four percentage points with 99% confidence assuming that a) she uses the estimate of 21.1% male and 19.9% female from a previous year? b) she does not use any prior estimates? a) n=? b) n=?
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 95% confidence, assuming that (a) he uses the estimates of 22.8% male and 18.8% female from a previous year? (b) he does not use any prior estimates?
A physical therapist wants to determine the difference in the proportion of men and women who participate in regular 15 physical activity what sample size should be obtained if she wishes the estimate to be within five percentage points with 90% confidence assuming that a) she uses the estimate of 21.9% male and 19.3% female from a previous year? b) she does not use any prior estimates?
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 90% confidence, assuming that (a) he uses the estimates of 21.5% male and 18.1% female from a previous year? (b) he does not use any prior estimates? (a) na (Round up to the nearest whole number.) (b) n= (Round up...
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 five percentage points with 90% confidence, assuming that (a) he uses the estimates of 22.6% male and 19.7% female from a previous year? (b) he does not use any prior estimates? (a) n (Round up to the nearest whole number.) (b) n=(Round up to...
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 five percentage points with 99% confidence, assuming that (a) he uses the estimates of 21.1% male and 19.8% female from a previous year? (b) he does not use any prior estimates? (a) na (Round up to the nearest whole number.) (b) = n=(Round up...