In a lottery, 1000 tickets are sold and there is one winning ticket. If you buy one ticket, what is the probability of winning?
0.1
0.001
0.01
1
What is the probability of getting tails when you flip a fair coin?
0.25
0.5
0
Suppose you are playing a game where you flip a coin until you get heads. What is the probability that it takes exactly 4 flips to get the first heads?
1/4
1/8
1/16
1/2
What does the addition rule of probability calculate?
Probability of one event AND another event occurring
Probability of two events occurring given that one has already happened
Probability of an event NOT occurring
Probability of one event OR another event occurring
What is the variance of a standard normal distribution (mean = 0, standard deviation = 1)?
2
A fair six-sided die is rolled. What is the probability of rolling an even number?
2/3
1/3
1/6
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 scenario does not fit the distributions described.
This can be approximated by a binomial distribution.
This can be approximated by a uniform distribution.
This can be approximated by a geometric distribution.
In a survey of 100 people, 60 like coffee and 40 like tea. What is the empirical probability that a randomly selected person likes coffee?
0.4
0.6
Cannot be determined
A company produces light bulbs, and 2% are defective. What is the probability that in a sample of 10 bulbs, exactly one is defective?
0.016
0.984
0.167
0.833
Which of the following measures the spread or dispersion of a random variable's values around its expected value?
Probability Mass Function
Cumulative Distribution Function
Expected Value
Variance