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f. Compute the estimated standard deviation of b₁. g. Use the t test to test the following hypothesis ß₁ = 0 at a = .05. What is your conclusion?

f. Compute the estimated standard deviation of b₁. g. Use the t test to test the following hypothesis ß₁ = 0 at a = .05. What is your conclusion?

MATLAB: An Introduction with Applications
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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Only need parts f. and g. Needed info in first picture. Questions in second picture.
e. Compute the standard error of the estimate. f. Compute the estimated standard deviation of b₁. g. Use the t test to test the following hypothesis B₁ = 0 at a = .05. What is your conclusion?
Transcribed Image Text:e. Compute the standard error of the estimate. f. Compute the estimated standard deviation of b₁. g. Use the t test to test the following hypothesis B₁ = 0 at a = .05. What is your conclusion?
4. A company has recorded data on the daily demand for its product (y in thousands of units) and the unit price (x in hundreds of dollars). A sample of 15 days demand and associated prices resulted in the following data. 2y=135 2 y = 1315 Σxy=616 Σχ = 75 Ex² = 469 a. What are the intercept and slope of estimated regression equation b. how do you interpret the intercept and slope of the estimated regression equation? c. Compute SSE, SST, and SSR. d. Compute the coefficient of determination r². Comment on the goodness of fit! 5
Transcribed Image Text:4. A company has recorded data on the daily demand for its product (y in thousands of units) and the unit price (x in hundreds of dollars). A sample of 15 days demand and associated prices resulted in the following data. 2y=135 2 y = 1315 Σxy=616 Σχ = 75 Ex² = 469 a. What are the intercept and slope of estimated regression equation b. how do you interpret the intercept and slope of the estimated regression equation? c. Compute SSE, SST, and SSR. d. Compute the coefficient of determination r². Comment on the goodness of fit! 5
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