I’m studying for my Statistics class and need an explanation.
Section 6.1 #38
Compute the mean and standard deviation of the random variable with the given discrete probability distribution.
Section 6.2 #38a
38. Big babies: The Centers for Disease Control and Prevention reports that 25% of baby boys 6–8 months old in the United States weigh more than 20 pounds. A sample of 16 babies is studied.
a. What is the probability that exactly 5 of them weigh more than 20 pounds?