Suppose that 50 men with a family history of prostate cancer participate in a study. First, the men's PSA levels are tested. After that, biopsies are performed on all of them, to gauge the effectiveness of PSA screening, and determine whether biopsies should have been performed. (Outside of the study, biopsies wouldn't be performed on all of them). The following table shows the results of the study. Number of Men Number of Men PSA Level Without with (ng/mL) Prostate Cancer Prostate Cancer 3 and above 4 2-2.99 12 1-1.99 0-0.99 13 1 Make sure that you fill in each answer area before checking "How Did I Do?". a. Suppose the cut-off value is set at 2. What is the sensitivity for this group? What is the specificity? The sensitivity is Number The specificity is Number b. Suppose the cut-off value is raised to 3. What is the sensitivity now for this group? What is the new specificity? The sensitivity is Number The specificity is Number
Suppose that 50 men with a family history of prostate cancer participate in a study. First, the men's PSA levels are tested. After that, biopsies are performed on all of them, to gauge the effectiveness of PSA screening, and determine whether biopsies should have been performed. (Outside of the study, biopsies wouldn't be performed on all of them). The following table shows the results of the study. Number of Men Number of Men PSA Level Without with (ng/mL) Prostate Cancer Prostate Cancer 3 and above 4 2-2.99 12 1-1.99 0-0.99 13 1 Make sure that you fill in each answer area before checking "How Did I Do?". a. Suppose the cut-off value is set at 2. What is the sensitivity for this group? What is the specificity? The sensitivity is Number The specificity is Number b. Suppose the cut-off value is raised to 3. What is the sensitivity now for this group? What is the new specificity? The sensitivity is Number The specificity is Number
MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Suppose that 50 men with a family history of prostate cancer participate in a study. First, the men’s PSA levels are tested. After that, biopsies are performed on all of them, to gauge the effectiveness of PSA screening, and determine whether biopsies should have been performed. (Outside of the study, biopsies wouldn’t be performed on all of them). The following table shows the results of the study.
a. Suppose the cut-off value is set at 2. What is the sensitivity for this group? What is the specificity?
Transcribed Image Text:Suppose that 50 men with a family history of prostate cancer participate in a study. First, the men's PSA levels are tested.
After that, biopsies are performed on all of them, to gauge the effectiveness of PSA screening, and determine whether
biopsies should have been performed. (Outside of the study, biopsies wouldn't be performed on all of them). The following
table shows the results of the study.
Number of Men
Number of Men
PSA Level
Without
with
(ng/mL)
Prostate Cancer
Prostate Cancer
3 and above
4
2-2.99
12
1-1.99
0-0.99
13
1
Make sure that you fill in each answer area before checking "How Did I Do?".
a. Suppose the cut-off value is set at 2. What is the sensitivity for this group? What is the specificity?
The sensitivity is
Number
The specificity is Number
b. Suppose the cut-off value is raised to 3. What is the sensitivity now for this group? What is the new specificity?
The sensitivity is Number
The specificity is Number
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