Introduction To Statistics And Data Analysis
6th Edition
ISBN: 9781337793612
Author: PECK, Roxy.
Publisher: Cengage Learning,
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Chapter 12.2, Problem 17E
Some colleges now allow students to pay their tuition using a credit card. The report “Credit Card Tuition Payment Survey 2014” (creditcards.com/credit-card-news/tuition-charge-fee-survey.php, retrieved May 27, 2017) includes data from a survey of 100 public 4-year colleges, 100 private 4-year colleges, and 100 community colleges. The accompanying table gives information on credit card acceptance for each of these samples of colleges. For purposes of this exercise, suppose that these three samples are representative of the populations of public 4-year colleges, private 4-year colleges, and community colleges in the United States. Is there convincing evidence that the proportions in each of the two credit card categories are not the same for all three types of colleges? Test the relevant hypotheses using a 0.05 significance level. (Hint: See Example 12.5.)
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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?
Are the t-statistics here greater than 1.96? What do you conclude?
colgPA= 1.39+0.412 hsGPA
(.33) (0.094)
Find the P value
Chapter 12 Solutions
Introduction To Statistics And Data Analysis
Ch. 12.1 - A particular cell phone case is available in a...Ch. 12.1 - From the given information in each case below, use...Ch. 12.1 - In 2014, the University of Houston carried out a...Ch. 12.1 - The Global Automotive 2016 Color Popularity Report...Ch. 12.1 - A popular urban legend is that more babies than...Ch. 12.1 - The authors of the paper External Factors and the...Ch. 12.1 - The authors of the paper Is It Really About Me?...Ch. 12.1 - The article In Bronx, Hitting Home Runs Is A...Ch. 12.1 - The authors of the paper Racial Stereotypes in...Ch. 12.1 - The paper Sociochemosensory and Emotional...
Ch. 12.1 - How would you answer the following question: Next...Ch. 12.1 - USA Today (Hybrid Car Sales Rose 81% Last Year,...Ch. 12.1 - A certain genetic characteristic of a particular...Ch. 12.2 - A particular state university system has six...Ch. 12.2 - A random sample of 1000 registered voters in a...Ch. 12.2 - Prob. 16ECh. 12.2 - Some colleges now allow students to pay their...Ch. 12.2 - The Knight Foundation asked each person in a...Ch. 12.2 - The Knight Foundation investigated whether high...Ch. 12.2 - Each person in a representative sample of 445...Ch. 12.2 - The report Education Pays 2016 (The College...Ch. 12.2 - The report Consumer Revolving Credit and Debt Over...Ch. 12.2 - Prob. 23ECh. 12.2 - The authors of the paper Movie Character Smoking...Ch. 12.2 - The data summarized in the accompanying table are...Ch. 12.2 - The paper Credit Card Misuse, Money Attitudes, and...Ch. 12.2 - Each person in a large sample of German...Ch. 12.2 - Can people tell the difference between a female...Ch. 12.3 - The following passage is from the paper Gender...Ch. 12.3 - The article titled Nap Time...Ch. 12.3 - Using data from a national survey, the authors of...Ch. 12 - Each observation in a random sample of 100 bicycle...Ch. 12 - The color vision of birds plays a role in their...Ch. 12 - Prob. 34CRCh. 12 - Prob. 35CRCh. 12 - Prob. 36CR
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