Final answer:
Dual Energy X-ray absorptiometry (DEXA) is the technique with the lowest error and provides an estimate of body composition within 0-1.8% of the true value. Bioelectrical impedance analysis (BIA) is another technique used for measuring body composition.
Step-by-step explanation:
Dual Energy X-ray absorptiometry (DEXA) is the technique of measuring body composition that has the lowest error and provides an estimate of body composition within 0-1.8% of the true value.
DEXA uses two low-dose X-ray beams to measure the amount of energy absorbed by the body, which is dependent on bone, lean tissue mass, and fat mass. Using mathematical formulas, fat content can be accurately estimated.
Bioelectrical impedance analysis (BIA) is another technique used to measure body composition. It works by passing a small amount of electricity through the body and measuring its rate of travel. However, BIA may have a higher error compared to DEXA.