Example: Plastic sheeting produced by a machine must be periodically monitored for possible fluctuations in thickness. Based on experience with a great many samples, when the machine is working well, an observation on thickness has a normal distribution with standard deviation o = 1.35 mm. Samples of 20 thickness measurements are collected regularly. A value of the sample standard deviation exceeding 1.4mm signals concern about the product. Find the probability that, when o = 1.35, the next sample will signal concern about the product.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Example: Plastic sheeting produced by a machine must be periodically monitored for
possible fluctuations in thickness. Based on experience with a great many samples,
when the machine is working well, an observation on thickness has a normal
distribution with standard deviation o = 1.35 mm.
Samples of 20 thickness measurements are collected regularly. A value of the sample
standard deviation exceeding 1.4mm signals concern about the product.
• Find the probability that, when o = 1.35, the next sample will signal concern about
the product.
Transcribed Image Text:● Example: Plastic sheeting produced by a machine must be periodically monitored for possible fluctuations in thickness. Based on experience with a great many samples, when the machine is working well, an observation on thickness has a normal distribution with standard deviation o = 1.35 mm. Samples of 20 thickness measurements are collected regularly. A value of the sample standard deviation exceeding 1.4mm signals concern about the product. • Find the probability that, when o = 1.35, the next sample will signal concern about the product.
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