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HLTH 501
W 2 P —30
EEK ROBLEMS POINTS
10 points per problem. Put answers in table below:
1.
A
B
C
D
E
F
G
H
2.
3.
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1. The following box-whisker plot shows the distributions of total cholesterol levels in boys and
girls 10-15 years of age.
Bo
ys
Girls
12 13 14 150 16 17 18 190 20 210 220 23 240 25 260 270
0 0 0 0 0 0 0 0 0
A.
What is the median total cholesterol level in boys? ________
B.
What is Q1 for boys? ________
HLTH 501
A.What is the sensitivity of self-reported smoking status?
B.What is the specificity of self-reported smoking status?
3. A recent study reported that the prevalence of hyperlipidemia (defined as total cholesterol over
200) is 30% in children 2–6 years of age. If 12 children are analyzed,
A.What is the probability that at least 3 are hyperlipidemic?
B.What is the probability that 3 are hyperlipidemic?
2. As part of a study, investigators wanted to assess the accuracy of self-reported smoking status.
Participants are asked whether they currently smoke or not. In addition, laboratory tests are
performed on hair samples to determine presence or absence of nicotine. The laboratory
assessment is considered the gold standard, or truth about nicotine. The data are as follows:
C.
What is Q3 for boys? ________
D.
Lower Limit for Outliers for boys: ________
E.
Upper Limit for Outliers boys: ________
F.
Are there any outliers in total cholesterol in boys? ________
G.
What proportions of the boys have total cholesterol less than 205? _______ %
H.
What proportions of the girls have total cholesterol less than 205? _______ %
Self-Reported Non-Smoker
Self-Reported Smoker
Nicotine Absent
82
12
Nicotine Present
14
52
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C.How many would be expected to meet the criteria for hyperlipidemia?
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