statistic normal distribution 17. Boxes of screws, nominally containing 250, have a mean content of 248 screws with astandard deviation of 7. If the contents are normally distributed, determine the probabilitythat a randomly chosen box will contain fewer than 240 screws.18. Samples of 10 A fuses have a mean fusing current of 9.9 A and a standard deviation of 1.2A. Determine the probability of a fuse blowing with a currenti. less than 7.0 A,ii. between 8.0 A and 12.0 A.

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Answered: 17. Boxes of screws, nominally…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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statistic

normal distribution

17. Boxes of screws, nominally containing 250, have a mean content of 248 screws with a
standard deviation of 7. If the contents are normally distributed, determine the probability
that a randomly chosen box will contain fewer than 240 screws.
18. Samples of 10 A fuses have a mean fusing current of 9.9 A and a standard deviation of 1.2
A. Determine the probability of a fuse blowing with a current
i. less than 7.0 A,
ii. between 8.0 A and 12.0 A.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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