Question: the probability distribution for a discrete random variable x is...
The probability distribution for a discrete random variable X is given in the table that follows.
X 2 3 4 5 6
P(X) 0.40 0.20 0.24 0.08 0.08
Your answers to the following questions must be expressed as a decimal correct to 3dp.
a) Find the probability that X is at least 4.
b) Find the mean of X.
c) Find the standard deviation of X.