85% of those trained were able to pass thepolygraph examination even when uilty of a crime. Suppose that arandom sample of nine students (in a psychology laboratory) aretold a “secret” and then given instructions on how topass the polygraph examination without revealing their knowledge ofthe secret. What is the probability that:

A) all the students are able to pass thepolygraph examination?

B) More than half areable to pass polygraph examination?

C) No more than four are able to pass the polygraph examination?
D) All the students fail

Question

85% of those trained were able to pass thepolygraph examination even when uilty of a crime. Suppose that arandom sample of nine students (in a psychology laboratory) aretold a “secret” and then given instructions on how topass the polygraph examination without revealing their knowledge ofthe secret. What is the probability that:

A)     all the students are able to pass thepolygraph examination?

B)      More than half areable to pass polygraph examination?

C)      No more than four are able to pass the polygraph examination?
D)     All the students fail

amistre64 · Answer

seems binomial to me

amistre64 · Answer

(.89 + .11)^9 expanded out would give us some probabilities to play with