An educational psychologist examined the relationship betwee

An educational psychologist examined the relationship between psychology departments’ national reputations and the number of scientific articles published by their faculties. A national ranking of the top 100 American psychology departments was obtained ( where 1 represented the lowest- rated department and 100 represented the highest- rated department), and for each department the number of publications generated by its faculty over the past year was tabulated.

Solution

An educational psychologist examined the relationship between psychology departments’ national reputations and the number of scientific articles published by their faculties. A national ranking of the top 100 American psychology departments was obtained ( where 1 represented the lowest- rated department and 100 represented the highest- rated department), and for each department the number of publications generated by its faculty over the past year was tabulated.

Psychology departments’ national reputations is in ranks.

The number of scientific articles published is in interval scale

To examine the relationship between the two variables, spearman rank correlation should be used.

Spearman rank correlation to test the association between two ranked variables, or one ranked variable and one measurement variable.