Error in High Yield Behavioral Science

Discussion in 'Step I' started by NeedToStudy, Sep 25, 2014.

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  1. NeedToStudy

    NeedToStudy 2+ Year Member

    Jan 16, 2014
    So I'm going through High Yield Behavioral Science 4th edition. On page 121 there is a equation for positive predictive value. It's basically true positive/ (true positives + false positive). The equation is 160/(160+40). It should equal 160/200= 80%. Instead it says that the equation equals 160/240 which equals 66.7%. Is this an error or am I missing something?
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  3. seminoma

    seminoma 2+ Year Member

    Aug 9, 2014
    Don't have the book on me, but if there are 160TP and 40FP, then PPV is 160/200.

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