SOLUTION: The standard error of the mean for a characteristic of a sample of 100 identity theft victims is 30. In order to cut the standard error to 15, we would:
a. Increase the sample
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Question 208222: The standard error of the mean for a characteristic of a sample of 100 identity theft victims is 30. In order to cut the standard error to 15, we would:
a. Increase the sample size to 200
b. Increase the confidence interval
c. Increase the sample size to 400
d. Decrease the sample size to 50
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The standard error of the mean for a characteristic of a sample of 100 identity theft victims is 30. In order to cut the standard error to 15, we would:
a. Increase the sample size to 200
b. Increase the confidence interval
c. Increase the sample size to 400
d. Decrease the sample size to 50
-----------------------------------------
SE = t
If SE = 30 and n = 100 you have
30 = t
ts = 300
---------------
If you want SE to be 15
you need:
15 = ts/sqrt(n)
15 = 300/sqrt(n)
sqrt(n) = 20
n = 400
======================
Cheers,
Stan H.
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