Question

Q. The following data relate to the marks obtained by 10 students of a class in English and Statistics: English Statistics 31 30 28 30 29 21 36 23 36 23 Compute Spearman's rank correlation coefficient. 31 19 34 22 24 30 29 28 39 28U

Answer 1

Rank Correlation

Sometimes there doesn’t exist a marked linear relationship between two random variables but a monotonic relation (if one increases, the other also increases or instead, decreases) is clearly noticed. Pearson’s Correlation Coefficient evaluation, in this case, would give us the strength and direction of the linear association only between the variables of interest. Herein comes the advantage of the Spearman Rank Correlation methods, which will instead, give us the strength and direction of the monotonic relation between the connected variables. This can be a good starting point for further evaluation.