Answered: 21. Problem 13 presented data showing a…

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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21. Problem 13 presented data showing a positive relationship between weight and income for a sample
of professional men. However, weight was coded
in five categories that could be viewed as an ordinal
scale rather than an interval or ratio scale. If so,
a Spearman correlation is more appropriate than
a Pearson correlation.

a. Convert the weights and the incomes into ranks
and compute the Spearman correlation for the
scores in problem 13.
b. Is the Spearman correlation large enough to be
significant?

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