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
icon
Related questions
Question

SHOW SOLUTION

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.
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.
Expert Solution
steps

Step by step

Solved in 3 steps with 3 images

Blurred answer
Recommended textbooks for you
Glencoe Algebra 1, Student Edition, 9780079039897…
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill
Big Ideas Math A Bridge To Success Algebra 1: Stu…
Big Ideas Math A Bridge To Success Algebra 1: Stu…
Algebra
ISBN:
9781680331141
Author:
HOUGHTON MIFFLIN HARCOURT
Publisher:
Houghton Mifflin Harcourt