Accurate measurement of body fat (e.g. by underwater weighing) can be inconvenient or costly and it is desirable to have easier methods of estimating body fat, such as those based on circumference measurements that are easily obtained. The goal is to develop 2 predictive equations for body fat in terms of the other measurements.
Added by Gloria E.
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These may include waist circumference, hip circumference, neck circumference, and possibly others like thigh or arm circumference. Show more…
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Rabeya Z.
Lawrence recently attended a local health fair to learn more about improving his diet and lifestyle. While there, a hospital worker used fat calipers on the back of his triceps to assess his percent body fat. A friend points out that skinfold calipers often give very inaccurate percent body fat readings. If Lawrence wants to obtain the most accurate percent body fat measurement, which method should he use?
Jennifer N.
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 $\mathrm{cm}$ ) measurements for the Neck, Chest, Abdomen, Ankle, Biceps, and Wrist. $^{78}$ Figure 2.73 shows the data and regression line for using weight to predict body fat percentage. For the case with the largest positive residual, estimate the values of both variables. In addition, estimate the predicted body fat percent and the residual for that point.
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Two Quantitative Variables: Linear Regression
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