hapter 7, Section 2, Exercise 031
Find the expected count and the contribution to the chi-square statistic for the (Group 3, No) cell in the two-way table below.
|
|
Yes
|
No
|
Total
|
|
Group 1
|
55
|
41
|
96
|
|
Group 2
|
139
|
64
|
203
|
|
Group 3
|
66
|
29
|
95
|
|
Total
|
260
|
134
|
394
|
Round your answer for the excepted count to one decimal place, and your answer for the contribution to the chi-square statistic to three decimal places.
Expected count=https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
contribution to the chi-square statistic=https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
Click if you would like to Show Work for this question:
|
Open Show Work
|
apter 7, Section 2, Exercise 032
Find the expected count and the contribution to the chi-square statistic for the (A,E) cell in the two-way table below.
|
|
D
|
E
|
F
|
G
|
Total
|
|
A
|
37
|
33
|
38
|
39
|
147
|
|
B
|
71
|
85
|
68
|
53
|
277
|
|
C
|
20
|
36
|
25
|
30
|
111
|
|
Total
|
128
|
154
|
131
|
122
|
535
|
Round your answer for the expected count to one decimal place, and your answer for the contribution to the chi-square statistic to three decimal places.
Expected count = Enter your answer; Expected counthttps://edugen.wileyplus.com/edugen/art2/common/pixel.gif
contribution to the chi-square statistic = Enter your answer; contribution to the chi-square statistichttps://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
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|
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Chapter 7, Section 2, Exercise 033
Find the expected count and the contribution to the chi-square statistic for the (Control, Disagree) cell in the two-way table below.
|
|
Strongly Agree
|
Agree
|
Neutral
|
Disagree
|
Strongly Disagree
|
|
Control
|
38
|
48
|
5
|
12
|
11
|
|
Treatment
|
57
|
45
|
10
|
7
|
0
|
Round your answer for the excepted count to one decimal place, and your answer for the contribution to the chi-square statistic to three decimal places.
Expected count=https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
contribution to the chi-square statistic=https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
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hapter 7, Section 2, Exercise 034
Find the expected count and the contribution to the chi-square statistic for the (Group 1, Yes) cell in the two-way table below.
|
|
Yes
|
No
|
|
Group 1
|
717
|
275
|
|
Group 2
|
1162
|
323
|
Round your answer for the excepted count to one decimal place, and your answer for the contribution to the chi-square statistic to three decimal places.
Expected count=https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
contribution to the chi-square statistic=https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
Click if you would like to Show Work for this question:
|
Open Show Work
|
apter 7, Section 2, Exercise 035
Give the degrees of freedom for the chi-square test based on the two-way table.
|
|
Yes
|
No
|
Total
|
|
Group 1
|
56
|
44
|
100
|
|
Group 2
|
132
|
68
|
200
|
|
Group 3
|
72
|
28
|
100
|
|
Total
|
260
|
140
|
400
|
Degrees of freedom=Enter your answer in accordance to the question statementhttps://edugen.wileyplus.com/edugen/art2/common/pixel.gif
exact number, no tolerance
|
Click if you would like to Show Work for this question:
|
Open Show Work
|
|
Chapter 8, Section 2, Exercise 041
Consider the data with analysis shown in the following computer output:
|
Level
|
N
|
Mean
|
StDev
|
|
A
|
5
|
10.400
|
3.049
|
|
B
|
5
|
16.800
|
2.168
|
|
C
|
5
|
10.800
|
2.387
|
|
Source
|
DF
|
SS
|
MS
|
F
|
P
|
|
Groups
|
2
|
128.53
|
64.27
|
9.78
|
0.003
|
|
Error
|
12
|
78.78
|
6.57
|
|
|
|
Total
|
14
|
207.31
|
|
|
|
Is there sufficient evidence of a difference in the population means of the three groups?
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
No
|
|
Click if you would like to Show Work for this question:
|
Open Show Work
|
|
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
|
|
Chapter 8, Section 2, Exercise 042
Consider the data with analysis shown in the following computer output:
|
Level
|
N
|
Mean
|
StDev
|
|
A
|
5
|
10.300
|
2.856
|
|
B
|
5
|
16.800
|
2.168
|
|
C
|
5
|
10.800
|
2.387
|
|
Source
|
DF
|
SS
|
MS
|
F
|
P
|
|
Groups
|
2
|
130.83
|
65.42
|
10.57
|
0.002
|
|
Error
|
12
|
74.22
|
6.19
|
|
|
|
Total
|
14
|
205.05
|
|
|
|
What is the pooled standard deviation? What degrees of freedom are used in doing inferences for these means and differences in means?
Round your answer for the pooled standard deviation to two decimal places.
The pooled standard deviation is https://edugen.wileyplus.com/edugen/art2/common/pixel.gif .
degrees of freedom=https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
Click if you would like to Show Work for this question:
|
Open Show Work
|
|
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
apter 8, Section 2, Exercise 046
Consider the data with analysis shown in the following computer output:
|
Level
|
N
|
Mean
|
StDev
|
|
A
|
5
|
87.566
|
4.952
|
|
B
|
5
|
76.167
|
6.555
|
|
C
|
7
|
80.000
|
9.230
|
|
D
|
7
|
69.333
|
6.154
|
|
Source
|
DF
|
SS
|
MS
|
F
|
P
|
|
Groups
|
3
|
1034.13
|
344.71
|
6.84
|
0.002
|
|
Error
|
20
|
1008.35
|
50.42
|
|
|
|
Total
|
23
|
2042.48
|
|
|
|
Is there sufficient evidence of a difference in the population means of the four groups?
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
No
|
|
Click if you would like to Show Work for this question:
|
Open Show Work
|
|
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
hapter 8, Section 2, Exercise 047
Consider the data with analysis shown in the following computer output:
|
Level
|
N
|
Mean
|
StDev
|
|
A
|
6
|
85.624
|
5.374
|
|
B
|
5
|
76.167
|
6.555
|
|
C
|
6
|
80.000
|
9.230
|
|
D
|
7
|
69.333
|
6.154
|
|
Source
|
DF
|
SS
|
MS
|
F
|
P
|
|
Groups
|
3
|
911.23
|
303.74
|
6.27
|
0.004
|
|
Error
|
20
|
969.47
|
48.47
|
|
|
|
Total
|
23
|
1880.70
|
|
|
|
What is the pooled standard deviation? What degrees of freedom are used in doing inferences for these means and differences in means?
Round your answer for the pooled standard deviation to two decimal places.
The pooled standard deviation is .
degrees of freedom=
|
Click if you would like to Show Work for this question:
|
Open Show Work
|
|
|
|
|
|
|
|
|
|
|
|
|
apter 9, Section 2, Exercise 030
Use the following ANOVA table for regression to answer the questions.
Analysis of Variance
|
Source
|
DF
|
SS
|
MS
|
F
|
P
|
|
Regression
|
1
|
318.7
|
318.7
|
2.01
|
0.158
|
|
Residual Error
|
174
|
27596.4
|
158.6
|
|
|
|
Total
|
175
|
27915.1
|
|
|
|
|
|
|
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
Give the F-statistic and p-value.
Enter the exact answers.
The F-statistic is https://edugen.wileyplus.com/edugen/art2/common/pixel.gif .
The p-value is https://edugen.wileyplus.com/edugen/art2/common/pixel.gif .
|
|
|
|
apter 9, Section 2, Exercise 031
Use the following ANOVA table for regression to answer the questions.
Analysis of Variance
|
Source
|
DF
|
SS
|
MS
|
F
|
P
|
|
Regression
|
1
|
3380.1
|
3380.1
|
20.4
|
0.000
|
|
Residual Error
|
174
|
28831.8
|
165.7
|
|
|
|
Total
|
175
|
32211.9
|
|
|
|
|
|
|
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
Give the F-statistic and p-value.
Enter the exact answers.
The F-statistic is https://edugen.wileyplus.com/edugen/art2/common/pixel.gif .
The p-value is https://edugen.wileyplus.com/edugen/art2/common/pixel.gif .
|
|
|
|
Chapter 9, Section 2, Exercise 032
Use the following ANOVA table for regression to answer the questions.
Response: Y
|
Source
|
DF
|
Sum Sq
|
Mean Sq
|
F-value
|
Pr(>F)
|
|
Regression
|
1
|
359.90
|
359.90
|
11.12
|
0.001
|
|
Residual Error
|
359
|
11620.83
|
32.37
|
|
|
|
Total
|
360
|
11980.73
|
|
|
|
|
|
|
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
Give the F-statistic and p-value.
Enter the exact answers.
The F-statistic is https://edugen.wileyplus.com/edugen/art2/common/pixel.gif .
The p-value is https://edugen.wileyplus.com/edugen/art2/common/pixel.gif .
|
|
|
|
Chapter 9, Section 2, Exercise 033
Use the following ANOVA table for regression to answer the questions.
Response: Y
|
Source
|
DF
|
Sum Sq
|
Mean Sq
|
F-value
|
Pr(>F)
|
|
Regression
|
1
|
10.087
|
10.087
|
2.89
|
0.090
|
|
Residual Error
|
342
|
1193.580
|
3.490
|
|
|
|
Total
|
343
|
1203.667
|
|
|
|
|
|
|
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
|
|
Give the F-statistic and p-value.
Enter the exact answers.
The F-statistic is https://edugen.wileyplus.com/edugen/art2/common/pixel.gif .
The p-value is https://edugen.wileyplus.com/edugen/art2/common/pixel.gif .
|
|
|
Chapter 9, Section 3, Exercise 059
Two intervals are given, A and B, for the same value of the explanatory variable.
|
A: 91 to 101;
|
B: 93 to 99;
|
(a) Which interval is the confidence interval for the mean response?
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
Which interval is the prediction interval for the response?
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
(b) What is the predicted value of the response variable for this value of the explanatory variable?
Enter the exact answer.
The predicted value is https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
.
exact number, no tolerance
|
Click if you would like to Show Work for this question:
|
Open Show Work
|
apter 9, Section 3, Exercise 058
Two intervals are given, A and B, for the same value of the explanatory variable.
(a) Which interval is the confidence interval for the mean response?
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
Which interval is the prediction interval for the response?
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
(b) What is the predicted value of the response variable for this value of the explanatory variable?
Enter the exact answer.
The predicted value is https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
.
exact number, no tolerance
|
Click if you would like to Show Work for this question:
|
Open Show Work
|
hapter 9, Section 3, Exercise 060
Two intervals are given, A and B, for the same value of the explanatory variable.
|
A: 3.8 to 6.6;
|
B: 2.7 to 7.7;
|
(a) Which interval is the confidence interval for the mean response?
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
Which interval is the prediction interval for the response?
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
(b) What is the predicted value of the response variable for this value of the explanatory variable?
Enter the exact answer.
The predicted value is https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
.
exact number, no tolerance
|
Click if you would like to Show Work for this question:
|
Open Show Work
|
wo intervals are given, A and B, for the same value of the explanatory variable.
|
A: 17.9 to 23.9;
|
B: 18.3 to 23.5;
|
(a) Which interval is the confidence interval for the mean response?
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
Which interval is the prediction interval for the response?
https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
(b) What is the predicted value of the response variable for this value of the explanatory variable?
Enter the exact answer.
The predicted value is https://edugen.wileyplus.com/edugen/art2/common/pixel.gif
.
exact number, no tolerance
|
Click if you would like to Show Work for this question:
|
Open Show Work
|