Joni teaches a preschool class. She has eight students and ranks them based upon math and reading ability. She would like to see if there is a relationship between how well her students are ranked in math and in reading. Which of the following correlations should she use?
A) Kendall's tau
B) Phi coefficient
C) Biserial
D) Eta

Question

Quizplus · Accepted Answer

Kendall's tau is a nonparametric correlation that can be used to measure the relationship between two ranked variables. In this case, Joni has ranked her students based on their math and reading ability, making Kendall's tau a suitable choice for analyzing the relationship between the two variables. Kendall's tau is also robust to the presence of ties in the data, which may occur when two or more students have the same math or reading ability ranking.

Joni Teaches a Preschool Class