Question
The lengths of lumber a machine cuts are normally distributed with a mean of 89 inches and a standard deviation of 0.7 inch. (a) What
The lengths of lumber a machine cuts are normally distributed with a mean of
89 inches and a standard deviation of 0.7 inch.
(a) What is the probability that a randomly selected board cut by the machine has a length greater than
89.24 inches?
(b) A sample of
37 boards is randomly selected. What is the probability that their mean length is greater than
89.24 inches?
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Concise Pre Algebra Workbook
Authors: Josiah Coates
1st Edition
1724185152, 978-1724185150
