subject
Mathematics, 25.02.2021 18:50 steve4020

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.)
X-bar=
S=
Describe the distribution of these differences using words. (which one is correct)
A. The distribution is left skewed.
B. The sample is too small to make judgments about skewness or symmetry.
C. The distribution is uniform.
D. The distribution is uniform.
E. The distribution is Normal.

ansver
Answers: 2

Another question on Mathematics

question
Mathematics, 21.06.2019 13:40
Show algebraically that f and g are inverse functions f(x)=x^2/-6; g(x)=square root of 2x+12
Answers: 1
question
Mathematics, 21.06.2019 18:00
The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second
Answers: 3
question
Mathematics, 21.06.2019 18:00
Carmen begins her next painting on a rectangular canvas that is 82.7 cm long and has a area of 8,137.68 cm2. will the painting fit in a frame with an opening that is 82.7 cm long and 95 cm wide? explain
Answers: 3
question
Mathematics, 22.06.2019 02:00
Milk and ice cream are mixed together for a recipe. the total volume of the mixture is 1 cup. if the milk contains 2% fat, the cream contains 18% fat ,and the mixture contains 6% fat ,how much cream is in the mixture
Answers: 1
You know the right answer?
Dual-energy X-ray absorptiometry (DXA) is a technique for measuring bone health. One of the most com...
Questions
question
Mathematics, 25.01.2022 03:00
question
Mathematics, 25.01.2022 03:00
question
Mathematics, 25.01.2022 03:10
question
Mathematics, 25.01.2022 03:10
question
Mathematics, 25.01.2022 03:10