The lengths of lumber a machine cuts are normally distributed with a mean of 100 inches and a standard deviation of 0.4 inch. (a) What is the probability that a randomly selected board cut by the machine has a length greater than 100.16 inches? (b) A sample of 41 boards is randomly selected. What is the probability that their mean length is greater than 100.16 inches?
The lengths of lumber a machine cuts are normally distributed with a mean of 100 inches and a standard deviation of 0.4 inch. (a) What is the probability that a randomly selected board cut by the machine has a length greater than 100.16 inches? (b) A sample of 41 boards is randomly selected. What is the probability that their mean length is greater than 100.16 inches?
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.CR: Chapter 13 Review
Problem 58CR
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