The regression line for predicting body fat percent using neck circumference is

(a) What body fat percent does the line predict for a person with a neck circumference of 35 cm? Of 40 cm?
(b) Interpret the slope of the line in context.
(c) One of the men in the study had a neck circumference of 38.7 cm and a body fat percent of 11.3. Find the residual for this man.

Use the dataset BodyFat, which gives the percent of weight made up of body fat for 100 men as well as other variables such as Age, Weight (in pounds), Height (in inches), and circumference (in cm) measurements for the Neck, Chest, Abdomen, Ankle, Biceps, and Wrist.

Transcribed Image Text:

BodyFat = -47.9 + 1.75 · Neck