What does the addition rule of probability calculate?
Probability of two events occurring given that one has already happened
Probability of one event AND another event occurring
Probability of an event NOT occurring
Probability of one event OR another event occurring
What does the Probability Density Function (PDF) represent for a continuous random variable?
A measure of the spread or variability of the variable.
The probability of the variable taking on a specific value.
The cumulative probability of the variable up to a given value.
The relative likelihood of the variable falling within a particular range.
A random variable Y has an expected value of 5 and a variance of 4. What is the expected value of Y - 2?
1
9
3
7
A fair coin is flipped 5 times. What is the probability of getting exactly 3 heads?
3/16
5/16
1/8
1/2
What does the complement rule in probability state?
The probability of an event not happening is 1 minus the probability of it happening.
The probability of an event is always 1.
The probability of an event happening is equal to the probability of it not happening.
The probability of two events happening is the sum of their individual probabilities.
If a random variable X follows a standard normal distribution, what is P(X = 0)?
Cannot be determined.
0.5
0
How many different ways can you arrange the letters in the word "DATA"?
4
16
24
12
If the variance of a random variable X is 9, what is the standard deviation of X?
6
81
What is the probability of getting tails when you flip a fair coin?
0.25
A bag contains 5 red balls and 3 blue balls. What is the probability of drawing a red ball, then another red ball without replacement?
5/14
25/64
5/8
9/64