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Mathematics, 17.12.2019 04:31 samchix9062
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 on the training they received and allows us to determine if one of the operators is producing measurements that are consistently higher than the other. here are the data:
subject
operator 1 2 3 4 5 6 7 8
1 1.326 1.337 1.079 1.229 0.936 1.009 1.179 1.289
2 1.323 1.322 1.073 1.233 0.934 1.019 1.184 1.304
take the difference between the tbbmc recorded for operator 1 and the tbbmc for operator 2. (operator 1 minus operator 2. round your answers to four decimal places.)
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