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The efficiency ratio for a steel specimen immersed in a

The efficiency ratio for a steel specimen immersed in a phosphating tank is the weight of the

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The efficiency ratio for a steel specimen immersed in a phosphating tank is the weight of the phosphate coating divided by the metal loss (both in mg/ft2). The article "Statistical Process Control of a Phosphate Coating Line" (Wire J. Intl., May 1997: 78-81) gave the accompanying data on tank temperature (x) and efficiency ratio (y).

a. Construct stem-and-leaf displays of both temperature and efficiency ratio, and comment on interesting features.
b. Is the value of efficiency ratio completely and uniquely determined by tank temperature? Explain your reasoning.
c. Construct a scatter-plot of the data. Does it appear that efficiency ratio could be very well predicted by the value of temperature? Explain your reasoning.

Transcribed Image Text:

Temp. | 170 172 173 174 174 175 176 Ratio 84 1.31 1.42 1.03 1.07 1.08 1.04 Temp. 177 180 180 180 180 180 181 Ratio 1.80 1.45 1.60 2.13 2.15 84 Temp.181 182 182 182 182 184 184 Ratio 1.43 90 1.81 .94 2.68 1.49 2.52 Temp.|185 186188 Ratio 3.00 1.87 3.08

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a Stem and Leaf display of temp 180 appears to be a typical value for this data The distribution is ...View the full answer

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Probability And Statistics For Engineering And The Sciences

ISBN: 9781305251809

9th Edition

Authors: Jay L. Devore

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Question Posted: Jan 27, 2017 11:31 AM

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