# HW 3 - HW 3 Chapters 4 and 5(from 3rd ed of text 1 5.23 A...

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HW 3 Chapters 4 and 5 (from 3 rd ed. of text) 1. 5.23. A certain assay for serum alanine aminotransferase (ALT) is rather imprecise. The results of repeated assays of a single specimen follow a normal distribution with mean equal to the ALT concentration for that specimen and standard deviation equal to 4 U/Li (as in Exercise 4.40). Suppose a hospital lab measures many specimens every day, and specimens with reported ALT values of 40 or more are flagged as “unusually high.” If a patient's true ALT concentration is 35 U/Li find the probability that his specimen will be flagged as “unusually high” a. if the reported value is the result of a single assay b. Find the 99th percentile of this distribution. c. if the reported value is the mean of three independent assays of the same specimen 2. 5.44. The heights of men in a certain population follow a normal distribution with mean 69.7 inches and standard deviation 2.8 inches. a. If a man is chosen at random from the population, find the probability that he will be more

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HW 3 - HW 3 Chapters 4 and 5(from 3rd ed of text 1 5.23 A...

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