Question

What is the expected standard deviation of a single coin flip, where heads = 1 and tails = 0?

Answer 1

This is Binomial with n=1 (1 flip) and `p=1/2` (assuming a fair coin)

Explanation:

mean `=np=1(1/2)=1/2`

variance `=npq =(1)(1/2)(1/2)=1/4`

standard deviation `= sqrt(1/4)=1/2`

hope that helped