Question

Body composition (%Fat) has been measured using Dual X-ray Absorptiometry in a sample of 250 participants. In our data set, male participants are coded as “1” and female participants are coded as “0.” The intercept for the equation is 23.6. The slope for Age is 0.2. What is the estimated %Fat for a 45 year old male participant? Please round your answer to the nearest tenths place.

Answer 1

Let y : body composition

X : age

The estimated regression equation is

y = 23.6 + 0.2* X

We asked X = 45

y = 23.6 + 0.2*45

y = 32.6

So answer is 32.6% fat