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hp mpg 1.000000 -0.866756 -0.772352 mpg wt wt -0.866756 1.000000 0.641831 hp -0.772352 0.641831 1.000000

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

What are the coefficients of correlation between miles per gallon and horsepower? Between miles per gallon and the weight of the car? What are the directions and strengths of these coefficients? Do the coefficients of correlation indicate a strong correlation, weak correlation, or no correlation between these variables?

MPG against Weight
30
25
I 20
15
10
15
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Weight (1000s Ibs)
MPG

mpg
wt
hp
mpg
1.000000 -0.866756 -0.772352
wt
-0.866756
1.000000
0.641831
hp
-0.772352
0.641831
1.000000

Definition Definition Relationship between two independent variables. A correlation tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.

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