Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales. To document this assertion, Mr. McWhinney gathered the following sample information. The x column indicates the number of client contacts last month and the y column shows the value of sales ($ thousands) last month for each client sampled. Number of Contacts, x Sales ($ thousands), y 14 24 12 14 20 28 16 30 46 80 23 30 48 90 a. Find the value of correlation coeffecient (r) : b. What is the regression equation : = + x c. Determine the estimated sales if 40 contacts are made.
Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales. To document this assertion, Mr. McWhinney gathered the following sample information. The x column indicates the number of client contacts last month and the y column shows the value of sales ($ thousands) last month for each client sampled. Number of Contacts, x Sales ($ thousands), y 14 24 12 14 20 28 16 30 46 80 23 30 48 90 a. Find the value of correlation coeffecient (r) : b. What is the regression equation : = + x c. Determine the estimated sales if 40 contacts are made.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales. To document this assertion, Mr. McWhinney gathered the following sample information. The x column indicates the number of client contacts last month and the y column shows the value of sales ($ thousands) last month for each client sampled.
| Number of Contacts, x | Sales ($ thousands), y |
| 14 | 24 |
| 12 | 14 |
| 20 | 28 |
| 16 | 30 |
| 46 | 80 |
| 23 | 30 |
| 48 | 90 |
a. Find the value of
b. What is the regression equation : = + x
c. Determine the estimated sales if 40 contacts are made.
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