The new screening found 250 positives, of which 80% were true positives. Full diagnostic testing showed there were 200 diagnosed cases were among the 500 individuals.

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter10: Matrices
Section10.EA: Extended Application Contagion
Problem 2EA
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A new imaging technology is being devised as an early screening for brain cancer. Five hundred
individuals were referred to a laboratory for the new brain cancer screening. To assess the
adequacy of the new screening, all five hundred individuals were later sent on for full diagnostic
testing (the "gold standard" for brain cancer).
The new screening found 250 positives, of which 80% were true positives.
Full diagnostic testing showed there were 200 diagnosed cases were among the 500 individuals.
Create and label a 2x2 for the above data. ("insert table" in the response box ribbon editor). Be sure
to calculate and label: the number of true positives, false positives, false negatives, and true
negatives for the new imaging technology.
Transcribed Image Text:A new imaging technology is being devised as an early screening for brain cancer. Five hundred individuals were referred to a laboratory for the new brain cancer screening. To assess the adequacy of the new screening, all five hundred individuals were later sent on for full diagnostic testing (the "gold standard" for brain cancer). The new screening found 250 positives, of which 80% were true positives. Full diagnostic testing showed there were 200 diagnosed cases were among the 500 individuals. Create and label a 2x2 for the above data. ("insert table" in the response box ribbon editor). Be sure to calculate and label: the number of true positives, false positives, false negatives, and true negatives for the new imaging technology.
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