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Probability and Statistics for Engineers and the Scientists | 9th Edition | ISBN: 9780321629111 | Authors: Ronald E. Walpole; Raymond H. Myers; Sharon L. Myers; Keying E. Ye
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A certain polymer is used for evacuation systems for

Chapter 2, Problem 1.3

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QUESTION:

A certain polymer is used for evacuation systems for aircraft. It is important that the polymer be resistant to the aging process. Twenty specimens of the polymer were used in an experiment. Ten were assigned randomly to be exposed to an accelerated batch aging process that involved exposure to high temperatures for 10 days. Measurements of tensile strength of the specimens were made, and the following data were recorded on tensile strength in psi: No aging: 227 222 218 217 225 218 216 229 228 221 Aging: 219 214 215 211 209 218 203 204 201 205 (a) Do a dot plot of the data. (b) From your plot, does it appear as if the aging process has had an eect on the tensile strength of thispolymer? Explain. (c) Calculate the sample mean tensile strength of the two samples. (d) Calculate the median for both. Discuss the similarity or lack of similarity between the mean and median of each group.

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QUESTION:

A certain polymer is used for evacuation systems for aircraft. It is important that the polymer be resistant to the aging process. Twenty specimens of the polymer were used in an experiment. Ten were assigned randomly to be exposed to an accelerated batch aging process that involved exposure to high temperatures for 10 days. Measurements of tensile strength of the specimens were made, and the following data were recorded on tensile strength in psi: No aging: 227 222 218 217 225 218 216 229 228 221 Aging: 219 214 215 211 209 218 203 204 201 205 (a) Do a dot plot of the data. (b) From your plot, does it appear as if the aging process has had an eect on the tensile strength of thispolymer? Explain. (c) Calculate the sample mean tensile strength of the two samples. (d) Calculate the median for both. Discuss the similarity or lack of similarity between the mean and median of each group.

ANSWER:

Q:A certain polymer is used for evacuation systems for aircraft. It is important that thepolymer be resistant to the aging process. Twenty specimens of the polymer were used inan experiment. Ten were assigned randomly to be exposed to an accelerated batch agingprocess that involved exposure to high temperatures for 10 days. Measurements of tensilestrength of the specimens were made, and the following data were recorded on tensilestrength in psi:(a) Do a dot plot of the data.(b) From your plot, does it appear as if the aging process has had an effect on the tensilestrength of this polymer Explain.(c) Calculate the sample mean tensile strength of the two samples.(d) Calculate the median for both. Discuss the similarity or lack of similarity between themean and median of each group. Step By Step Solution:Step 1 of 4:(a) Do a dot plot of the data.The following is the data plot for the data:

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