What is the standard error of a sample proportion p^\hat{p}p^?
p(1−p)n\sqrt{\frac{p(1-p)}{n}}np(1−p)
pn\frac{p}{\sqrt{n}}np
σn\frac{\sigma}{\sqrt{n}}nσ
np(1−p)\sqrt{np(1-p)}np(1−p)