The serum cholesterol levels of a population of 12-to 14-year-olds follow a normal distribution with mean 155
Question:
(a) What percentage of the 12- to 14-year-olds have serum cholesterol values between 145 and 165 mg/dl?
(b) Suppose we were to choose at random from the population a large number of groups of nine 12- to 14-year-olds each. In what percentage of the groups would the group mean cholesterol value be between 145 and 165 mg/dl?
(c) If Y represents the mean cholesterol value of a random sample of nine 12- to_l4-year-olds from the population, what is Pr{145 ≤ ≤ 165}?
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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Statistics For The Life Sciences
ISBN: 9780321989581
5th Edition
Authors: Myra Samuels, Jeffrey Witmer, Andrew Schaffner
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