Dual-energy X-ray absorptiometry (DXA) is a technique for
measuring bone health. One of the most common measures is total
body bone mineral content (TBBMC). A highly skilled operator is
required to take the measurements. Recently, a new DXA machine was
purchased by a research lab, and two operators were trained to take
the measurements. TBBMC for eight subjects was measured by both
operators. The units are grams (g). A comparison of the means for
the two operators provides a check...