STATS:DATA+MODELS(LL)-W/ACCESS>CUSTOM<
21st Edition
ISBN: 9780137643219
Author: DeVeaux
Publisher: PEARSON
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Chapter 4, Problem 39E
a.
To determine
Find the group with the highest score.
b.
To determine
Find the group with the greater
c.
To determine
Find the group with largest inter
c.
To determine
Find the month with the smallest range.
d.
To determine
Find the best group based on the results of test scores.
e.
To determine
Find the overall mean of the class.
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Question 2
A nickel-titanium alloy is used to make components for jet turbine aircraft engines. Cracking is a potentially
serious problem in the final part because it can lead to nonrecoverable failure. A test is run at the parts producer
to determine the effect of four factors on cracks. The four factors are: pouring temperature (A), titanium content
(B), heat treatment method (C), amount of grain refiner used (D). Two replicates of a 24 design are run, and
the length of crack (in mm x10-2) induced in a sample coupon subjected to a standard test is measured. The
data are shown in Table 2.
1
(a) Estimate the factor effects. Which factor effects appear to be large?
(b) Conduct an analysis of variance. Do any of the factors affect cracking? Use a = 0.05.
(c) Write down a regression model that can be used to predict crack length as a function of the significant
main effects and interactions you have identified in part (b).
(d) Analyze the residuals from this experiment.
(e) Is there an…
A 24-1 design has been used to investigate the effect of four factors on the resistivity of a silicon wafer. The data
from this experiment are shown in Table 4.
Table 4: Resistivity Experiment for Exercise 5
Run
A
B
с
D
Resistivity
1
23
2
3
4
5
6
7
8
9
10
11
12
I+I+I+I+Oooo
0
0
||++TI++o000
33.2
4.6
31.2
9.6
40.6
162.4
39.4
158.6
63.4
62.6
58.7
0
0
60.9
3
(a) Estimate the factor effects. Plot the effect estimates on a normal probability scale.
(b) Identify a tentative model for this process. Fit the model and test for curvature.
(c) Plot the residuals from the model in part (b) versus the predicted resistivity. Is there any indication on
this plot of model inadequacy?
(d) Construct a normal probability plot of the residuals. Is there any reason to doubt the validity of the
normality assumption?
Stem1: 1,4
Stem 2: 2,4,8
Stem3: 2,4
Stem4: 0,1,6,8
Stem5: 0,1,2,3,9
Stem 6: 2,2
What’s the Min,Q1, Med,Q3,Max?
Chapter 4 Solutions
STATS:DATA+MODELS(LL)-W/ACCESS>CUSTOM<
Ch. 4.1 - The Bureau of Transportation Statistics of the...Ch. 4.1 - The Bureau of Transportation Statistics of the...Ch. 4.1 - Prob. 3JCCh. 4 - Prob. 1ECh. 4 - Prob. 2ECh. 4 - 3. Fuel economy The boxplot shows the fuel economy...Ch. 4 - 4. Prisons 2014 In a way, boxplots are the...Ch. 4 - Load factors 2017 by month Here is a display of...Ch. 4 - Load factors 2017 by year Here is a display of the...Ch. 4 - Prob. 7E
Ch. 4 - Load factors 2017 by year again The box plots of...Ch. 4 - Prob. 9ECh. 4 - Load factors 2017 over time, a second look Here is...Ch. 4 - Prob. 11ECh. 4 - Prob. 12ECh. 4 - 15. Cost of living 2016, selected cities To help...Ch. 4 - Prob. 16ECh. 4 - 17. Rock concert deaths Crowd Management...Ch. 4 - Slalom times 2018 The Men’s Giant Slalom skiing...Ch. 4 - Prob. 19ECh. 4 - Prob. 20ECh. 4 - Prob. 21ECh. 4 - Prob. 22ECh. 4 - Prob. 23ECh. 4 - Prob. 24ECh. 4 - Prob. 25ECh. 4 - Prob. 26ECh. 4 - Prob. 27ECh. 4 - Prob. 28ECh. 4 - Prob. 29ECh. 4 - 30. Ozone Ozone levels (in parts per billion, ppb)...Ch. 4 - Prob. 31ECh. 4 - 32. Eye and hair color A survey of 1021 school-age...Ch. 4 - Prob. 33ECh. 4 - 34. Vineyards Here are summary statistics for the...Ch. 4 - 35. Caffeine A student study of the effects of...Ch. 4 - Prob. 36ECh. 4 - Prob. 37ECh. 4 - Prob. 38ECh. 4 - Prob. 39ECh. 4 - Prob. 40ECh. 4 - Prob. 41ECh. 4 - Prob. 42ECh. 4 - Prob. 43ECh. 4 - Prob. 44ECh. 4 - Prob. 45ECh. 4 - Prob. 46ECh. 4 - Prob. 47ECh. 4 - 48. Rainmakers The table lists the amounts of...Ch. 4 - Prob. 49ECh. 4 - Prob. 50ECh. 4 - Prob. 51ECh. 4 - Prob. 52ECh. 4 - 13. Pizza prices by city (Data in Pizza prices)...
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