The probability of receiving a "false positive" from a mammogram is 7%. What is the probability that out of 10 mammograms, a patient receives at least 1 false positive?

Question

bobpursley · Answer

Pr(at least one false)=1-pr(gettingnofalse)=1-.83^10 .83^10=.155, so pr(getting at least one false in 10) is 1-.155=.845 Hmmm. So, the thought of annual mammograms is comforting?

PsyDAG · Answer

Since the false positive p = .07, wouldn't you need 1-.93 as P of not getting false positive?

Jake · Answer

Yes you definitely do need 1-0.93. Psydag, you are correct!