Multiple Choice
A public policy research group is conducting a study of health care plans and would like to estimate the average dollars contributed annually to health savings accounts by participating employees. A pilot study conducted a few months earlier indicated that the standard deviation of annual contributions to such plans was $1,225. The research group wants the study's findings to be within $100 of the true mean with a confidence level of 90%. What sample size is required?
A) 407
B) 361
C) 512
D) 546
Correct Answer:
Verified
Correct Answer:
Verified
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