Find the mean, variance and standard deviation. n=122, p= 0.86

Question

Find the mean, variance and standard deviation. n=122, p= 0.86

Answer 1

Mean is N*p = 122 * 0.86 = 104.92

standard deviation is sqrt( N*p*(1-p) ) =

sqrt( 122 * 0.86 * 0.14)

= 3.8325970307351645705705111729654....

variance is the square of the standard deviation