Recent content by nessa

The answer is 12. Do NOT simply give out the answer. In fact, don't give the answer at all in the homework section! (Not even a wrong answer! The question was about the standard deviation, not the mean.) (Editted by HallsofIvy)

Homework Statement In a recent survey, 80% of the community favored building a police substation in their neighborhood. If 15 citizen are chosen, what is the standard deviation of the number favoring the substation? Homework Equations I know that my mean is 15 and the probiblilty is 80...