A marketing executive wants to understand the differences in customer satisfaction scores between two companies offering the same service. The executive collects the following data for customer satisfaction. Assume the two populations have the same variance. Assuming that the two populations have equal variances, what is the critical t-value for a 99% confidence interval (same as for a two-sided test at a 1% significance level) for the difference between the population means? Round your answer to three decimal places. Assuming equal variances, what is the standard error of the difference in sample means (the standard deviation of the sample mean from company 1 minus the sample mean from company 2)? Round your answer to three decimal places. Company 1 Company 2 1 4 7 1 10 0 3 2 7 0 8 2 3 2 6 3 7 2 1 2 7 4 9 6 9 3 4 0 10 2 8 1 9 10 8 7 5 0 10 1 2 4 3 7 2 0 9 10 8 1 3 3 5 2 8 2 9 10 7 6 4 8 4 3 1 5 0 4 5 2
A marketing executive wants to understand the differences in customer satisfaction scores between two companies offering the same service. The executive collects the following data for customer satisfaction. Assume the two populations have the same variance. Assuming that the two populations have equal variances, what is the critical t-value for a 99% confidence interval (same as for a two-sided test at a 1% significance level) for the difference between the population means? Round your answer to three decimal places. Assuming equal variances, what is the standard error of the difference in sample means (the standard deviation of the sample mean from company 1 minus the sample mean from company 2)? Round your answer to three decimal places. Company 1 Company 2 1 4 7 1 10 0 3 2 7 0 8 2 3 2 6 3 7 2 1 2 7 4 9 6 9 3 4 0 10 2 8 1 9 10 8 7 5 0 10 1 2 4 3 7 2 0 9 10 8 1 3 3 5 2 8 2 9 10 7 6 4 8 4 3 1 5 0 4 5 2
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
A marketing executive wants to understand the differences in customer satisfaction scores between two companies offering the same service. The executive collects the following data for customer satisfaction. Assume the two populations have the same variance.
Assuming that the two populations have equal variances, what is the critical t-value for a 99% confidence interval (same as for a two-sided test at a 1% significance level) for the difference between the population means? Round your answer to three decimal places.
Assuming equal variances, what is the standard error of the difference in sample means (the standard deviation of the sample mean from company 1 minus the sample mean from company 2)? Round your answer to three decimal places.
| Company 1 | Company 2 |
| 1 | 4 |
| 7 | 1 |
| 10 | 0 |
| 3 | 2 |
| 7 | 0 |
| 8 | 2 |
| 3 | 2 |
| 6 | 3 |
| 7 | 2 |
| 1 | 2 |
| 7 | 4 |
| 9 | 6 |
| 9 | 3 |
| 4 | 0 |
| 10 | 2 |
| 8 | 1 |
| 9 | 10 |
| 8 | 7 |
| 5 | 0 |
| 10 | 1 |
| 2 | 4 |
| 3 | 7 |
| 2 | 0 |
| 9 | 10 |
| 8 | 1 |
| 3 | 3 |
| 5 | 2 |
| 8 | 2 |
| 9 | 10 |
| 7 | 6 |
| 4 | 8 |
| 4 | 3 |
| 1 | 5 |
| 0 | 4 |
| 5 | 2 |
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 4 steps with 3 images
Recommended textbooks for you
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman