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A large discount department store chain advertises on television (X1), and on the radio (X2). A sample of 12 of its stores in the certain area showed expenditures and revenues during a given month. All figures are in thousands of dollars. The dataset is summarised below.

A large discount department store chain advertises on television (X1), and on the radio (X2). A sample of 12 of its stores in the certain area showed expenditures and revenues during a given month. All figures are in thousands of dollars. The dataset is summarised below.

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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QUESTION 1 A large discount department store chain advertises on television (X1), and on the radio (X2). A sample of 12 of its stores in the certain area showed expenditures and revenues during a given month. All figures are in thousands of dollars. The dataset is summarised below. Television | Radio advertising Television & Radio advertising advertising 12 X'X = 115 1191 12 X'X = | 68 410] (X'X) =|-0.001810563 0.109897957 0.000189003 - 0.001625893 -0.00000012663 0.000287136 647 X'Y = 6393 647 X'Y : 3868 [-10.11045936] YY= 39973 and b, = 1.956197151 and Ex,X, = 654 7.990629999 a) Interpret the given slopes. b) Use the given information to find X'Y for the two independent variables (i.e. Television & Radio advertising). c) Regardless of the results of the overall regression significance test, test for the significance of the individual predictors using the partial F-test. findin
Transcribed Image Text:QUESTION 1 A large discount department store chain advertises on television (X1), and on the radio (X2). A sample of 12 of its stores in the certain area showed expenditures and revenues during a given month. All figures are in thousands of dollars. The dataset is summarised below. Television | Radio advertising Television & Radio advertising advertising 12 X'X = 115 1191 12 X'X = | 68 410] (X'X) =|-0.001810563 0.109897957 0.000189003 - 0.001625893 -0.00000012663 0.000287136 647 X'Y = 6393 647 X'Y : 3868 [-10.11045936] YY= 39973 and b, = 1.956197151 and Ex,X, = 654 7.990629999 a) Interpret the given slopes. b) Use the given information to find X'Y for the two independent variables (i.e. Television & Radio advertising). c) Regardless of the results of the overall regression significance test, test for the significance of the individual predictors using the partial F-test. findin
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