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. (Round the final answers to 2 decimal places.) y y^2 ху 35 57 17 22 3,249 484 1,995 374 19 34 1,156 646 13 23 529 299 32 38 1,444 1,216 30 34 1,156 1,020 22 32 1,024 704 19 30 900 570 32 50 2,500 1,600 25 30 900 750 244 350 13,342 9,174 a. Determine the standard error of estimate. b. Suppose a large sample is selected (instead of just 10). About 95% of the predictions regarding sales would occur between what two values? Assuming that the Standard Error of Estimate does not change. Use z= 2. y±

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. (Round the final answers to 2 decimal places.) y y^2 ху 35 57 17 22 3,249 484 1,995 374 19 34 1,156 646 13 23 529 299 32 38 1,444 1,216 30 34 1,156 1,020 22 32 1,024 704 19 30 900 570 32 50 2,500 1,600 25 30 900 750 244 350 13,342 9,174 a. Determine the standard error of estimate. b. Suppose a large sample is selected (instead of just 10). About 95% of the predictions regarding sales would occur between what two values? Assuming that the Standard Error of Estimate does not change. Use z= 2. y±

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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