A city librarian claims that books have been checked out an average of seven (or more) times
Question:
a. If the mean number of checkouts per book per year really is 7, what is the z -score corresponding to four?
b. Considering your answer to part a , do you have reason to believe that the librarian’s claim is incorrect?
c. If you knew that the distribution of the number of checkouts was mound shaped, would your answer to part b change? Explain.
d. If the standard deviation of the number of checkouts per book per year were 2 (instead of 1), would your answers to parts b and c change? Explain.
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...
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