a. Compute the standard deviation b. Compute for the standard deviation of the error of the difference. c. Compute the t ratio d Test the significance of t. e. Conclusion.
a. Compute the standard deviation b. Compute for the standard deviation of the error of the difference. c. Compute the t ratio d Test the significance of t. e. Conclusion.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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![1. People's opinion were asked about the president's performance. Opinions were polled before he was
inaugurated to office and after two years in office. Is there a change in opinions.
Ind. Before
Inauguration years
After 2
1
90
70
2
90
75
3
94
60
4
92
60
80
65
86
60
7
77
60
72
50
9
70
65
10 83
11 85
12 89
70
40
70
65
13
45
a. Compute the standard deviation
b. Compute for the standard deviation of the error of the difference.
c. Compute the t ratio
d. Test the significance of t.
e. Conclusion.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fca74183c-8e8b-41ec-99ce-e639a023e811%2Fe127c2a1-f4d7-45c2-a972-7f8e710634e5%2F27fbrgx_processed.jpeg&w=3840&q=75)
Transcribed Image Text:1. People's opinion were asked about the president's performance. Opinions were polled before he was
inaugurated to office and after two years in office. Is there a change in opinions.
Ind. Before
Inauguration years
After 2
1
90
70
2
90
75
3
94
60
4
92
60
80
65
86
60
7
77
60
72
50
9
70
65
10 83
11 85
12 89
70
40
70
65
13
45
a. Compute the standard deviation
b. Compute for the standard deviation of the error of the difference.
c. Compute the t ratio
d. Test the significance of t.
e. Conclusion.
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