Suppose that a researcher using on class size CS and average

Suppose that a researcher using on class size (CS) and average test scores (TS) for 106 third grade classes, estimates the following OLS sample regression function:

Please interpret the coefficient on “CS”, ie, the number \"-5.7618\"

Solution

It shows that as class size increase by one, Average test score decreases by 5.7618. But since R² is just 0.09 the class size can\'t explain much part of Average test score.