Example 2.20

EXAMPLE 2.20

Regression line for fat gain. Any straight line describing the nonexercise activity data has the form

fat gain = b₀ + (b₁ × NEA increase)

In Figure 2.17, we have drawn the regression line with the equation

fat gain = 3.505 − (0.00344 × NEA increase)

Figure 2.17 A regression line fitted to the nonexercise activity data and used to predict fat gain for an NEA increase of 400 calories, Examples 2.20 and 2.21.

The figure shows that this line fits the data well. The slope b₁ = −0.00344 tells us that fat gained goes down by 0.00344 kilogram for each added calorie of NEA increase.