- #1

Mr Davis 97

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## Homework Statement

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You want to see if a coin is fair. You flip it 5 times and count the number of heads. If

*H*is the number of heads obtained in five flips of the coin, what is the

*P-*value of the test when

*H*equals 4?

## Homework Equations

None

## The Attempt at a Solution

To solve this problem, I thought that it would be correct to use the binomial PDF, to answer the question "If the probability of getting heads is .5, then what are the chances of getting 4 heads in 5 flips?" This gives .15625, which is not the right P-value. The correct answer is 3/16, but how do I get this value? What probability distribution to I use to obtain this P-value?