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Biostatistics
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Work Sheet #4
Name(s):
Solution Key
2000
2200
2400
We investigate the relationship between fat-free body mass (kg) and energy expenditure
(kcal) for 7 men obtained during a 24-hour period. The goal of the study is to determine
how guidelines for daily caloric intake should be adjusted for lean body mass. Numerical
summaries are as follows: mean and standard deviation of fat-free body mass 62.4 kg and
12.1 kg, respectively; mean and standard deviation of energy expenditure 2168 kcal and 284
kcal, respectively; correlation r = 0.9817.
45
mass
energy
1
49.3
1898.0
50
55
2
59.3
2058.0
60
65
3
68.3
2216.0
70
75
4
48.1
1838.0
80
5
57.6
2085.0
6
78.1
2520.0
7
76.1
2564.0
1. Identify which variable is the response variable and which is the explanatory variable.
2. Label the axes and plot the pairs of observations.
3. Describe the plot.
4. Find the equation of the least squares line and add it to your plot.
5. Find the predicted energy expenditure for a subject with 65 kg of fat-free mass.
BIOS 7021
1
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We investigate the relationship between fat-free body mass (kg) and energy
expenditure (kcal) for 7 men obtained during a 24-hour period. The goal of the study
is to determine how guidelines for daily caloric intake should be adjusted for lean
body mass. Numerical summaries are as follows: mean and standard deviation of
fat-free body ma...
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No topic, descritpion or citation is provided.4.0 ptsThis criterion is linked to a Learning OutcomePart I: Sample Data4.0 ptsProficient Student provides ALL 50 pieces of data.3.0 ptsAbove Average Student provides 30-49 pieces of data.2.0 ptsAverage Student provides 20 - 29 pieces of data.1.0 ptsNeeds Improvement Student provides 1-19 pieces of data.0.0 ptsNo Effort. No Data was provided.4.0 ptsThis criterion is linked to a Learning OutcomePart I: Mean & Standard Deviation5.0 ptsProficient Mean & Sample Standard Deviation of the data set is correct with no rounding error. .4.0 ptsAbove Average Mean & Sample Standard Deviation of the data set is correct but with roujnding error.3.0 ptsAverage One Value (either mean or sample standsrd deviation) is correct but the other is not correct.1.0 ptsNeeds Improvement Both the Mean & Sample Standard Deviation are incorrect but it was attempted.0.0 ptsNo Effort. 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