Chapter 12.1, Problem 24E

To determine

To find: the correct option for the slope ${\beta }_1$ of the population regression line.

Answer to Problem 24E

The average increase in height (cm) for students at this high school when height increases by 1 cm

Explanation of Solution

Given:

  

  $\begin{array}{l}x=\text{foot length}\\ y\text{ = height}\end{array}$

  ${\beta }_1$ refers to the slope of the population regression line.

The slope of the population regression line shows the average increase of y in the population per unit of x.

Therefore ${\beta }_1$ then shows the average increase in the height of all individuals in the population per cm of foot length.

Hence, the correct option is (c)