Homework Answers
7
mean (mu) = 62
standard deviation (sd) = 3.5
X = 55
P(X>55) = P{ (X-mu)/sd > {(55-62)/3.5} = P(z > -2) = 0.9772 or 97.7%
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Question 25 Not yet answered Points out of 4.00 P Flag question The heights of I8.-year-old men are approximately normally distributed with mean 68 inches and standard deviation 3 inches. What is the probability that the average height of a sample of ten 18-year-old men will be between 71 and 78 inches? Select one: a. 0.0008 O b. 04992 O C. 0.0318 O d. 0.0016 o e. 09992 Previous page Finish attempt O Type there to search 8 9
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