Question

Find the​ mean, variance, and standard deviation of the binomial distribution with the given values of n and p. n equals 125n=125​, p equals 0.46

Answer 1

This is a matter of knowing the formulas involving the binomial distribution: Mean = n*p = 125*0.46 = 57.5
 Variance = n*p*(1-p) = 125*0.46*(1-0.46) = 125*0.46*0.54 = 31.05
 Standard Deviation = sqrt(Variance) = sqrt(31.05) = 5.572252686