Question

Let p(x)=(x+3)/15 for x= 1,2,3 be a probability mass function of X. Calculate: i. P (X ≤ 2)
Ii. E(X) and deviation×

Answer 1

Answer:

pX(x) = P(X = x) = 2 x − 1 36 for x = 1 , 2 , 3 , 4 , 5 , 6 Note that all the probabilities are positive and that they sum to one. where p(t) is the value of the probability distribution of X at t, is called the cumulative distribution function of X. The function FX (x) is also called the distribution function of X.