Multiple Choice
Educational Research plans a study to estimate the length of the average workweek for faculty members at public universities by taking a simple random sample of this group.If you want to insure a 90% probability that the sample mean you produce will be no more than 1 hour away from the actual population mean, how large a sample should you select for your study.Based on previous experience, you estimate a population standard deviation of approximately 12 hours.
A) 315
B) 392
C) 342
D) 487
E) 429
Correct Answer:
Verified
Correct Answer:
Verified
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