Posted by Mschribe on .
Suppose that a coin is tossed 100 times. Let X be the number of times that it shows heads. Find the mean and standard deviation of X.

statistics 
MathGuru,
mean = np = (100)(.5) = ?
standard deviation = √npq = √(100)(.5)(.5) = ?
(Note: q = 1  p)
I'll let you finish the calculations.