Question
The lengths of lumber a machine cuts are normally distributed with a mean of 93 inches and a standard deviation of 0.6 inch. (a) What
The lengths of lumber a machine cuts are normally distributed with a mean of 93 inches and a standard deviation of 0.6 inch.
(a) What is the probability that a randomly selected board cut by the machine has a length greater than 93.17 inches?
(b) A sample of 41 boards is randomly selected. What is the probability that their mean length is greater than 93.17 inches?
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Understanding Analysis
Authors: Stephen Abbott
1st Edition
6610189684, 9786610189687
