The article Caffeine Knowledge, Attitudes, and Consumption in Adult Women (J. of Nutrition Educ., 1992: 179-184) reports

Question:

The article "Caffeine Knowledge, Attitudes, and Consumption in Adult Women" (J. of Nutrition Educ., 1992: 179-184) reports the following summary data on daily caffeine consumption for a sample of adult women: n = 47, = 215 mg, s = 235 mg, and range = 5 - 1176.
a. Does it appear plausible that the population of daily caffeine consumption is normal? Is it necessary to assume a normal population to test hypotheses about the value of the population mean consumption? Explain your reasoning.
b. Suppose it had previously been believed that mean consumption was at most 200 mg. Does the given data contradict this prior belief? Test the appropriate hypotheses at significance level .10.
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...