The Spearman rank-correlation coefficient is
A)a correlation measure based on the average of data items
B)a correlation measure based on rank-ordered data for two variables
C)a correlation measure based on the median of data items
D)None of these alternatives is correct.

Question

Quizplus · Accepted Answer

The Spearman rank-correlation coefficient is a measure of the strength and direction of association between two variables that uses rank-ordered data. It is calculated by converting the raw scores of each variable to ranks and then calculating the Pearson correlation coefficient on the ranks. This approach is useful when the data are non-linear or non-normally distributed.

The Spearman Rank-Correlation Coefficient Is