How many different ways can you arrange the letters in the word "DATA"?
24
16
4
12
A fair coin is flipped 5 times. What is the probability of getting exactly 3 heads?
1/2
1/8
5/16
3/16
A website experiences an average of 5 user registrations per hour. What is the probability that there will be exactly 3 registrations in the next hour?
This can be approximated by a uniform distribution.
This can be approximated by a geometric distribution.
This can be approximated by a binomial distribution.
This scenario does not fit the distributions described.
If you roll a fair six-sided die, what is the probability of rolling a 3 OR an even number?
2/3
1/3
1/6
Which of the following is NOT a valid probability value?
0
1
0.75
1.25
A fair coin is flipped twice. What is the expected value of the number of heads?
1.5
2
You are playing a game where you roll a die until you get a 6. What is the probability that you will roll the die exactly 4 times before winning?
(5/6)^3 * (1/6)
(1/6)^3 * (5/6)
(5/6)^4 * (1/6)
(1/6)^4
A random variable X has a probability distribution as follows: P(X=0) = 0.2, P(X=1) = 0.3, P(X=2) = 0.5. What is the expected value of X?
1.2
0.5
You roll a fair six-sided die. What is the probability of rolling a number greater than 4?
Which of the following measures the spread or dispersion of a random variable's values around its expected value?
Probability Mass Function
Expected Value
Cumulative Distribution Function
Variance