saparil
Forum Newbie
Topics: 7
Posts: 9
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please please
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| SmokyWaters
Forum Elite
Topics: 6
Posts: 458
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A
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| SmokyWaters
Forum Elite
Topics: 6
Posts: 458
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for explanation
its as under
find the true positive rate of the test: 250/1000 = 25%...
n true negative rate of test : 100/1000 = 10%
80 ppl out of 100000 havin the disease...so true positives are the ppl out of those 80 ... so how much ppl as TRUE POSITIVES the test can find??
25% x 80 = 20
now how much population is not diseased??
100000- 80 = 99920
the false positive rate is 10% so 10% of this HEALTHY population will be found positive accordin to the test..which is the definition of bein false positive..
10% x 99920 = 9992
see the choice A... its the same
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| SmokyWaters
Forum Elite
Topics: 6
Posts: 458
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hope it helps..sorry my language isnt good... I cant explain well 
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| Ig F
Forum Elite
Topics: 3
Posts: 439
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u made an excellent explanation....good luck!!!!!
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i m not perfect but i wanna get close to it......
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