Answered: Thompson Photo Works purchased several…

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

Thompson Photo Works purchased several new, highly sophisticated processing machines. The production department needed some guidance with respect to qualifications needed by an operator. Is age a factor? Is the length of service as an operator (in years) important? In order to explore further the factors needed to estimate performance on the new processing machines, four variables were listed:

x₁ = Length of time an employee was in the industry

x₂ = Mechanical aptitude test score

x₃ = Prior on-the-job rating

x₄ = Age

Performance on the new machine is designated y.

Thirty employees were selected at random. Data were collected for each, and their performances on the new machines were recorded. A few results are:

	Performance on New Machine,	Length of Time in Industry,	Mechanical Aptitude Score,	Prior On-the-Job Performance,	Age,
Name	y	x₁	x₂	x₃	x₄
Mike Miraglia	118	11	343	122	50
Sue Trythall	116	8	307	128	21

The equation is:

yˆ

= 10.2 + 0.2x₁ + 0.486x₂ + 0.812x₃ + 0.008x₄

As age increases by one year, how much does estimated performance on the new machine increase? (Round your answer to 3 decimal places.)

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