## Function Confidence-Interval-Proportion

(

**confidence-interval-proportion** &rest < args > )

confidence-interval-proportion (x n confidence)

Suppose we have a sample of ` n' things and `

x' of them are ` `

successes.'' We

can estimate the population proportion of successes as x/n; call it ` p-hat.'<br> This function computes the estimate and a confidence interval on it. This<br> function is not appropriate for small samples with p-hat far from 1/2: `

x'

should be at least 5, and so should ` n'-`

x.' This function returns three values:

p-hat, and the lower and upper bounds of the confidence interval. `Confidence'

should be a number between 0 and 1, exclusive.