/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Free solutions & answers for Probability And Statistics For Engineering And Sciences Chapter 16 - (Page 1) [step by step] 9781305251809 | 91Ó°ÊÓ

91Ó°ÊÓ

Chapter 16: Quality Control Methods

Q11E

Page 690

The accompanying table gives sample means and standard deviations, each based on\(n = 6\)observations of the refractive index of fiber-optic cable. Construct a control chart, and comment on its appearance. (Hint:\(\Sigma {\bar x_i} = 2317.07\)and\(\left. {\Sigma {s_i} = 30.34.} \right)\)

\(\begin{aligned}{*{20}{l}}{Day\;\;\;\;\;\;\;bar\left( x \right)\;\;\;\;s\;\;\;\;\;\;\;\;\;\;\;\;Day\;\;\;\;\;\;\;bar\left( x \right)\;\;\;\;s}\\{1\;\;\;\;\;\;\;\;\;\;\;\;95.47\;\;\;\;1.30\;\;\;\;\;\;13\;\;\;\;\;\;\;\;\;\;97.02\;\;\;\;1.28}\\{2\;\;\;\;\;\;\;\;\;\;\;\;97.38\;\;\;\;.88\;\;\;\;\;\;\;\;14\;\;\;\;\;\;\;\;\;\;95.55\;\;\;\;1.14}\\{3\;\;\;\;\;\;\;\;\;\;\;\;96.85\;\;\;\;1.43\;\;\;\;\;\;15\;\;\;\;\;\;\;\;\;\;96.29\;\;\;\;1.37}\\{4\;\;\;\;\;\;\;\;\;\;\;\;96.64\;\;\;\;1.59\;\;\;\;\;\;16\;\;\;\;\;\;\;\;\;\;96.80\;\;\;\;1.40}\\{5\;\;\;\;\;\;\;\;\;\;\;\;96.87\;\;\;\;1.52\;\;\;\;\;\;17\;\;\;\;\;\;\;\;\;\;96.01\;\;\;\;1.58}\\{6\;\;\;\;\;\;\;\;\;\;\;\;96.52\;\;\;\;1.27\;\;\;\;\;\;18\;\;\;\;\;\;\;\;\;\;95.39\;\;\;\;.98}\\{7\;\;\;\;\;\;\;\;\;\;\;\;96.08\;\;\;\;1.16\;\;\;\;\;\;19\;\;\;\;\;\;\;\;\;\;96.58\;\;\;\;1.21}\\{8\;\;\;\;\;\;\;\;\;\;\;\;96.48\;\;\;\;.79\;\;\;\;\;\;\;\;20\;\;\;\;\;\;\;\;\;\;96.43\;\;\;\;.75}\\{9\;\;\;\;\;\;\;\;\;\;\;\;96.63\;\;\;\;1.48\;\;\;\;\;\;21\;\;\;\;\;\;\;\;\;\;97.06\;\;\;\;1.34}\\{10\;\;\;\;\;\;\;\;\;\;96.50\;\;\;\;.80\;\;\;\;\;\;\;\;22\;\;\;\;\;\;\;\;\;\;98.34\;\;\;\;1.60}\\{11\;\;\;\;\;\;\;\;\;\;97.22\;\;\;\;1.42\;\;\;\;\;\;23\;\;\;\;\;\;\;\;\;\;96.42\;\;\;\;1.22}\\{12\;\;\;\;\;\;\;\;\;\;96.55\;\;\;\;1.65\;\;\;\;\;\;24\;\;\;\;\;\;\;\;\;\;95.99\;\;\;\;1.18\;\;\;\;\;\;\;}\end{aligned}\)

Q4E

Page 680

A cork intended for use in a wine bottle is considered acceptable if its diameter is between 2.9 cm and 3.1 cm (so the lower specification limit is LSL 5 2.9 and the upper specification limit is USL 5 3.1).

a. If cork diameter is a normally distributed variable with mean value 3.04 cm and standard deviation .02 cm, what is the probability that a randomly selected cork will conform to specification?

b. If instead the mean value is 3.00 and the standard deviation is .05, is the probability of conforming to specification smaller or larger than it was in (a)?

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