The Correlation Coefficient r · Exercise 1
In order to have a correlation coefficient between traits A and B, it is necessary to have:
(a) one group of subjects, some of whom possess characteristics of trait A, the remainder possessing those of trait B
(b) measures of trait A on one group of subjects and of trait B on another group
(c) two groups of subjects, one which could be classified as A or not A, the other as B or not B
(d) two groups of subjects, one which could be classified as A or not A, the other as B or not B
OpenStax, Introductory Business Statistics 2e · §13.1 The Correlation Coefficient r · Exercise 1
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