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# The article Towards Improving the Properties ofPlaster Moulds and Castings (J. Engr

ISBN: 9781305251809 122

## Solution for problem 17 Chapter 11.2

Probability and Statistics for Engineering and the Sciences | 9th Edition

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Problem 17

The article Towards Improving the Properties ofPlaster Moulds and Castings (J. Engr. Manuf., 1991:265269) describes several ANOVAs carried out to studyhow the amount of carbon fiber and sand additions affectvarious characteristics of the molding process. Here wegive data on casting hardness and on wet-mold strength. Sand Carbon Fiber Casting Wet-MoldAddition (%) Addition (%) Hardness Strength 0 0 61.0 34.0 0 0 63.0 16.0 15 0 67.0 36.0 15 0 69.0 19.0 30 0 65.0 28.0 30 0 74.0 17.0 0 .25 69.0 49.0 0 .25 69.0 48.0 15 .25 69.0 43.0 15 .25 74.0 29.0 30 .25 74.0 31.0 30 .25 72.0 24.0 0 .50 67.0 55.0 0 .50 69.0 60.0 15 .50 69.0 45.0 15 .50 74.0 43.0 30 .50 74.0 22.0 30 .50 74.0 48.0a. An ANOVA for wet-mold strength gives SS Sand 5705, SSFiber 5 1278, SSE 5 843, and SST 5 3105.Test for the presence of any effects using a 5 .05.b. Carry out an ANOVA on the casting hardness observationsusing a 5 .05.c. Plot sample mean hardness against sand percentagefor different levels of carbon fiber. Is the plot consistentwith your analysis in part (b)?

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Chapter 2, Part One: Frequency Distributions, Histograms, and Related Topics 1. Frequency Distribution: paritions data into classes and assigns each class a frequency a. Frequency Tables: displays information in a frequency distribution, by listing each...

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##### ISBN: 9781305251809

Probability and Statistics for Engineering and the Sciences was written by and is associated to the ISBN: 9781305251809. The answer to “The article Towards Improving the Properties ofPlaster Moulds and Castings (J. Engr. Manuf., 1991:265269) describes several ANOVAs carried out to studyhow the amount of carbon fiber and sand additions affectvarious characteristics of the molding process. Here wegive data on casting hardness and on wet-mold strength. Sand Carbon Fiber Casting Wet-MoldAddition (%) Addition (%) Hardness Strength 0 0 61.0 34.0 0 0 63.0 16.0 15 0 67.0 36.0 15 0 69.0 19.0 30 0 65.0 28.0 30 0 74.0 17.0 0 .25 69.0 49.0 0 .25 69.0 48.0 15 .25 69.0 43.0 15 .25 74.0 29.0 30 .25 74.0 31.0 30 .25 72.0 24.0 0 .50 67.0 55.0 0 .50 69.0 60.0 15 .50 69.0 45.0 15 .50 74.0 43.0 30 .50 74.0 22.0 30 .50 74.0 48.0a. An ANOVA for wet-mold strength gives SS Sand 5705, SSFiber 5 1278, SSE 5 843, and SST 5 3105.Test for the presence of any effects using a 5 .05.b. Carry out an ANOVA on the casting hardness observationsusing a 5 .05.c. Plot sample mean hardness against sand percentagefor different levels of carbon fiber. Is the plot consistentwith your analysis in part (b)?” is broken down into a number of easy to follow steps, and 189 words. The full step-by-step solution to problem: 17 from chapter: 11.2 was answered by , our top Statistics solution expert on 11/08/17, 04:06AM. This full solution covers the following key subjects: . This expansive textbook survival guide covers 88 chapters, and 2432 solutions. Since the solution to 17 from 11.2 chapter was answered, more than 269 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Probability and Statistics for Engineering and the Sciences, edition: 9.

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