A video media consultant collected the following data on popular LED televisions sold through on-line retailers. Manufacturer Screen (in inches) Price ($) Sharp 46 736.50 Samsung 52 1,150.00 Samsung 46 895.00 Sony 40 625.00 Sharp 42 773.25 Samsung 46 961.25 Samsung 40 686.00 Sharp 37 574.75 Sharp 46 1,000.00 Sony 40 722.25 Sony 52 1,307.50 Samsung 32 373.75 Sharp 37 657.25 Sharp 32 426.75 Sharp 52 1,389.00 Samsung 40 874.75 Sharp 32 517.50 Samsung 52 1,475.00 Sony 40 954.25 Sony 52 1,551.50 Sony 46 1,303.00 Sony 46 1,430.50 Sony 52 1,717.00 d. Include the variable “Sony” in the multiple regression analysis as a “dummy” variable. Note that if “Sony = 0” the manufacturer is Samsung; if “Sony = 1” the manufacturer is Sony. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.) e. Test each of the individual coefficients to see if they are significant. (Negative amounts should be indicated by a minus sign. Round your t-value to 2 decimal places and p-value to 4 decimal places.)

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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A video media consultant collected the following data on popular LED televisions sold through on-line retailers.

Manufacturer	Screen (in inches)	Price ($)
Sharp	46	736.50
Samsung	52	1,150.00
Samsung	46	895.00
Sony	40	625.00
Sharp	42	773.25
Samsung	46	961.25
Samsung	40	686.00
Sharp	37	574.75
Sharp	46	1,000.00
Sony	40	722.25
Sony	52	1,307.50
Samsung	32	373.75
Sharp	37	657.25
Sharp	32	426.75
Sharp	52	1,389.00
Samsung	40	874.75
Sharp	32	517.50
Samsung	52	1,475.00
Sony	40	954.25
Sony	52	1,551.50
Sony	46	1,303.00
Sony	46	1,430.50
Sony	52	1,717.00

d. Include the variable “Sony” in the multiple regression analysis as a “dummy” variable. Note that if “Sony = 0” the manufacturer is Samsung; if “Sony = 1” the manufacturer is Sony. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.)

e. Test each of the individual coefficients to see if they are significant. (Negative amounts should be indicated by a minus sign. Round your t-value to 2 decimal places and p-value to 4 decimal places.)