Question

What are the mean and standard deviation of a binomial probability distribution with `n=130` and `p=3/4`?

Answer 1

Mean is nxp and variance is nxpxq

Explanation:

Here n = 130

p =`3/4`
q = `1/4`
So mean = 130 x `(3/4)` = `390 / 4` = 97.5
Variance = 130 x `3/4` x `1/4` = `390/16` = 24.375
Standard deviation = `sqrt(variance)` = `sqrt(24.375)`