Probability distributions

Question 1 of 10

X follows a binomial distribution with n = 20 and p = 0.3. What is the variance of X?

Question 2 of 10

What is the expected score when a fair six-sided die is thrown?

Question 3 of 10

A fair coin is tossed 4 times. P(exactly 2 heads) is

Question 4 of 10

A discrete variable X takes values 1, 2, 3 with probabilities 0.2, 0.5, 0.3. Find E(X).

Question 5 of 10

The sum of all probabilities in a probability distribution is

Question 6 of 10

X follows a binomial distribution with n = 20 and p = 0.3. What is the mean of X?

Question 7 of 10

For a Poisson distribution with mean 2, P(X = 0) is

Question 8 of 10

For X ~ B(5, 0.5), P(X = 0) is

Question 9 of 10

For a binomial distribution B(n, p), the mean is

Question 10 of 10

For X ~ B(10, 0.3), the variance is