Information given in 11-1: 12.1. Exercise 11.1 described a regression model betw
ID: 3064928 • Letter: I
Question
Information given in 11-1:
12.1. Exercise 11.1 described a regression model between percent of body fat (%BF) as measured by immersion and BMI from a study on 250 male subjects. The researchers also meas ured 13 physical characteristics of each man, including his age (yrs), height (in), and waist size (in) A regression of percent of body fat with both height and waist as predictors shows the following computer output: Estimate Std. Error t-value Pr(t|) (Intercept) -3.10088 Height Waist Residual standard error: 4.46 on 247 degrees of freedom Multiple R-squared: 0.7132, Adjusted R-squared: 0.7109 F-statistic: 307.1 on 2 and 247 DF, p-value:Explanation / Answer
Here dependent variable is body fat and there are two independent variables which are height and waist size.
The regression equation will be,
Body fat = -3.10 - 0.60*height + 1.77*waist
Now we have to predict body fat when height = 6 feet and waist = 34
Body fat = -3.10 - 0.60*6 + 1.77*34 = 53.48