fox
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A new screening test is designed to rule of the occurence of the disease 95% of the time. If the test is done on 8 successive individuals, what is the probability that atleast one of them will have a positive test?
a) 1-0.05 x 8
b) 0.95 x 8
c) 0.05^8 - (note ^ indicates rased to the power)
d) 0.95^8
e) 1-0.95^8
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| ManuNastai
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I think it's 0,05x8.. this is not among the answers
95 tests out of 100 are TN, 5% are FP. the Q asks what's the probability that at least one is positive.. so that's 0.05x8
maybe I'm wrong
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| fox
Forum Guru
Topics: 70
Posts: 727
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No...according the formula u used it seems like u are not deriving the true positive....instead u r deriving at least one who tests false positive. Thatz why u dont have that choice.
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| ManuNastai
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I'm not very good at this biostatistics, but seems to me that the Q is talking about specificity (negativity of health). and is not asking about the TP, but for the positive test result.. regardless if it's TP or FP.
I probably am wrong because my judgement doesn't fit the answers given, so i ask someone who is better at these stuff to clear the picture
thanks
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