The lengths of lumber a machine cuts are normally distributed with a mean of 86 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 86.21 inches?(b) A sample of 41 boards is randomly selected. What is the probability that their mean length is greater than 86.21 inches?

GivenMean(μ)=86standard deviation(σ)=0.6

Answered: The lengths of lumber a machine cuts…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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