preparation fees is $50.   What is the probability that the mean price for a sample of 30 H&R Block retail customers is within $8 of the population mean?   What is the probability that the mean price for a sample of 50 H&R Block retail customers is within $8 of the population mean?   What is the probability that the mean price for a sample of 100 H&R Block retail customers is within $8 of the population mean?

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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The mean preparation fee H&R Block charged retail customers in 2012 was $183 (The Wall Street Journal, March 7, 2012). Use this price as the population mean and assume the population standard deviation of preparation fees is $50.
 
What is the probability that the mean price for a sample of 30 H&R Block retail customers is within $8 of the population mean?
 
What is the probability that the mean price for a sample of 50 H&R Block retail customers is within $8 of the population mean?
 
What is the probability that the mean price for a sample of 100 H&R Block retail customers is within $8 of the population mean?
 
Which, if any, of the sample sizes in parts (a), (b), and (c) would you recommend to have at least a 0.95 probability that the sample mean is within $8 of the population mean?
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