Another comparison of DXA machine operators. Refer to the previous exercise. TBBMC measures the total amount of mineral in the bones. Another important variable is total body bone mineral density (TBBMD). This variable is calculated by dividing TBBMC by the area corresponding to bone in the DXA scan. The units are grams per squared centimeter (g/cm2). Here are the TBBMD values for the same subjects:
Analyze these data using the questions in the previous exercise as a guide.