Question: The director of graduate admissions at a local university is analyzing the relationship between scores on the Graduate Record Examination (GRE) and subsequent performance in graduate school, as measured by a student's grade point average (GPA). She uses a sample of 10 students who graduated within the past five years.
![616_GRE.png](https://secure.tutorsglobe.com/CMSImages/616_GRE.png)
a. Calculate and interpret the covariance.
b. Calculate and interpret the coefficient of correlation. Does an applicant's GRE score seem to be a good indicator of subsequent performance in graduate school?