# What are the mean and standard deviation of a binomial probability distribution with #n=130 # and #p=7/9 #?

##### 1 Answer

May 7, 2016

Mean =

Standard Deviation = 4.74 (3 sig. fig.)

#### Explanation:

Mean = np, so

Variance = npq.

We know that

So

Therefore the variance is

Standard deviation is the square root of the variance, so s.d. =