a. What is the probability that the mean price for a sample of 30 federal income tax retums is within $16 of the population mean? b. What is the probability that the mean price for a sample of 50 federal income tax retums is within $16 of the population mean? c. What is the probability that the mean price for a sample of 100 federal income tax retums is within $16 of the population mean? d. Which, if any, of the sample sizes in parts (a), (b), and (c) would you recommend to ensure at least a .95 probability that the sample mean is within $16 of the population mean?

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