*3.68 What is the sensitivity of the test for light-smoking students (students who smoke ≤ 14 cigarettes per week)? *3.69 What is the tincid fal
*3.68 What is the sensitivity of the test for light-smoking students (students who smoke ≤ 14 cigarettes per week)? *3.69 What is the tincid fal
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Please answer only 3.68
Transcribed Image Text:Suppose the self-reports are completely accurate and are
representative of the number of eighth-grade students who
smoke in the general community. We are considering using
an SCN level 2 100 µg/mL as a test criterion for identifying
cigarette smokers. Regard a student as positive if he or she
smokes one or more cigarettes per week.
*3.68 What is the sensitivity of the test for light-smoking
students (students who smoke ≤ 14 cigarettes per week)?
*3.69 What is the sensitivity of the test for moderate-smoking
students (students who smoke 15-44 cigarettes per week)?
*3.70 What is the sensitivity of the test for heavy-smoking
students (students who smoke ≥ 45 cigarettes per week)?
*3.71 What is the specificity of the test?
*3.72 What is the PV of the test?
![al. [11]). The lowest detection limit for dried blood spot coti-
nine was 3.1 ng/mL. The data in Table 3.9 were presented
relating dried blood spot cotinine determinations to umbilical
cord blood cotinine determinations.
Suppose a cutoff of 25 ng/mL is proposed as a criterion for
testing positive based on dried blood spot cotinine levels.
3.64 What is the sensitivity using this cut-point?
3.65 What is the specificity using this cut-point?
Suppose it is estimated based on a large sample of births in
California that 20% of mothers smoke at the time of delivery.
Suppose the screening test for detecting whether a mother
smokes at the time of pregnancy is based on a cutoff of 25
ng/mL using dried blood specimens from the newborn.
TABLE 3.9
Cotinine Level
in Dried
Blood (ng/mL)
<3.1
3.1
4
567800
Maternal
Active
Smoking = yes
2
0
0
0
2
1
1
Maternal
Active
Smoking = no
TABLE 3.10 Relationship between SCN levels and
self-reported cigarettes smoked per week
326
2
2
1
1
0
1
Self-reported
cigarettes smoked
in past week
None
1-4
5-14
Distribution of Cotinine Level in Dried Blood Spots from Newborns by Maternal
Active Smoking Status* close to the time of delivery among 428 babies delivered in
California, 2001-2003
15-24
25-44
45+
Cotinine Level
in Dried
Blood (ng/mL)
9
10
11
12
13
≥14
Total
Source: Based on the American Journal of Public Health, 71(12), 1320, 1981.
Number of
students
1
1163
70
30
Maternal
Active
Smoking = yes
232185
76
91
27
19
23
*Maternal active smoking at the time of delivery was defined as cord blood levels of 210 ng/mL.
Percent with
SCN100 µg/mL
Maternal
Active
Smoking = no
3
0
0
0
1
0
337
3.3
4.3
6.7
29.6
36.8
65.2](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F03210149-7bd1-493b-9cd1-96815f185546%2F6146051a-9d65-4636-b822-0b093e9334fe%2Fsczmshb_processed.jpeg&w=3840&q=75)
Transcribed Image Text:al. [11]). The lowest detection limit for dried blood spot coti-
nine was 3.1 ng/mL. The data in Table 3.9 were presented
relating dried blood spot cotinine determinations to umbilical
cord blood cotinine determinations.
Suppose a cutoff of 25 ng/mL is proposed as a criterion for
testing positive based on dried blood spot cotinine levels.
3.64 What is the sensitivity using this cut-point?
3.65 What is the specificity using this cut-point?
Suppose it is estimated based on a large sample of births in
California that 20% of mothers smoke at the time of delivery.
Suppose the screening test for detecting whether a mother
smokes at the time of pregnancy is based on a cutoff of 25
ng/mL using dried blood specimens from the newborn.
TABLE 3.9
Cotinine Level
in Dried
Blood (ng/mL)
<3.1
3.1
4
567800
Maternal
Active
Smoking = yes
2
0
0
0
2
1
1
Maternal
Active
Smoking = no
TABLE 3.10 Relationship between SCN levels and
self-reported cigarettes smoked per week
326
2
2
1
1
0
1
Self-reported
cigarettes smoked
in past week
None
1-4
5-14
Distribution of Cotinine Level in Dried Blood Spots from Newborns by Maternal
Active Smoking Status* close to the time of delivery among 428 babies delivered in
California, 2001-2003
15-24
25-44
45+
Cotinine Level
in Dried
Blood (ng/mL)
9
10
11
12
13
≥14
Total
Source: Based on the American Journal of Public Health, 71(12), 1320, 1981.
Number of
students
1
1163
70
30
Maternal
Active
Smoking = yes
232185
76
91
27
19
23
*Maternal active smoking at the time of delivery was defined as cord blood levels of 210 ng/mL.
Percent with
SCN100 µg/mL
Maternal
Active
Smoking = no
3
0
0
0
1
0
337
3.3
4.3
6.7
29.6
36.8
65.2
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