A study was conducted to determine whether a student’s final…
A study was conducted to determine whether a student’s final grade in a high school math class is linearly related to his or her performance on the math ability test administered before college entrance. The math test scores and final grades for a random sample of 10 students are shown below. Final Grade in Math Class (X) Math Ability Test Score (Y) 65 39 78 43 52 21 82 64 92 57 89 47 73 28 98 75 56 34 75 52 Find the variance of the final grades in the math class (i.e., variable X).