A standardized test has a mean of 99 and a standard deviation of 13. We want to be 98% certain that we are within 3 points of the true mean. Determine the required sample size a. 1 b. 11 c. 102 d. 201 Solution answer will be b 11 using standard deviation definitions and mean and the given condition that we are 3 points of the true mean.

1. A standardized test has a mean of 99 and a standard deviation of 13. We want to be 98% certain
that we are within 3 points of the true mean. Determine the required sample size a. 1 b. 11 c.
102 d. 201
Solution
answer will be b
11 using standard deviation definitions and mean
and the given condition that we are 3 points of the true mean