# A) what is the probability that the mean price for a sample of

The mean preparation fee H&R Block charged retail customers in 2012 was \$183. Use this price as the population means and assume the population standard deviation of preparation fees is \$50.

a)      What is the probability that the mean price for a sample of 30 H&R Block retail customers is within \$8 if the population mean?

b)      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?

c)      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?

d)     Which, if any, of the sample sizes in parts a, b,and c would you recommend to have at least a .95 probability that the sample mean is within \$8 of the population mean?

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