The Regression Equation · Exercise 1

Table 12.16 below represents the relationship between the number of hours spent studying and final exam grades.

$$\begin{array}{cc}\text{x (number of hours spent studying)}& \text{y (final exam grades)}\\ \text{3}& \text{50}\\ \text{5}& \text{72}\\ \text{1}& \text{45}\\ \text{2}& \text{51}\\ \text{6}& \text{80}\\ \text{8}& \text{96}\\ \text{4}& \text{65}\\ \text{7}& \text{90}\end{array}$$
Fill in the following chart as a first step in finding the line of best fit, using the median–median approach.

$$\begin{array}{ccccc}\text{Group}& \text{x (no. of hours spent studying)}& \text{y (final exam grades)}& \text{Median x Value}& \text{Median y Value}\\ \text{1}& & & & \\ \text{2}& & & & \\ \text{3}& & & & \end{array}$$

OpenStax, Statistics · §12.2 The Regression Equation · Exercise 1