Z score of proportion
From OPOSSEM
<math>z = \frac {(p)(1-p)}{\sqrt {(n)(p)(1-p)}}</math>
Question: Should the denominator be <math>\sqrt {(n-1)(p)(1-p)}</math>?
<math>z = \frac {(p)(1-p)}{\sqrt {(n)(p)(1-p)}}</math>
Question: Should the denominator be <math>\sqrt {(n-1)(p)(1-p)}</math>?