Elementary Statistics
Chapter 5 | Probability
Distributions & Binomial
Distributions Study
Guide, Practice Questions
& Exam Review
|Guaranteed success|
, What is a probability distribution? A description that gives the probability for each
value of the random variable, often expressed in a
table, formula, or graph.
What is a discrete random variable? A random variable that has a collection of values
that is finite or countable.
What is a continuous random A random variable that has infinitely many values
variable? and the collection of values is not countable.
What is the first requirement of a There is a numerical random variable x, and its
probability distribution? values are associated with corresponding
probabilities such that ∑P(x) = 1.
What is the second requirement of a 0 ≤ P(x) ≤ 1 for every individual value of the random
probability distribution? variable x.
In the example of two births, what is The number of females when two babies are born.
the random variable x?
What are the possible values of x in 0, 1, or 2 females.
the two births example?
What does a probability histogram It visually represents a probability distribution with
depict? probabilities on the vertical scale.
Chapter 5 | Probability
Distributions & Binomial
Distributions Study
Guide, Practice Questions
& Exam Review
|Guaranteed success|
, What is a probability distribution? A description that gives the probability for each
value of the random variable, often expressed in a
table, formula, or graph.
What is a discrete random variable? A random variable that has a collection of values
that is finite or countable.
What is a continuous random A random variable that has infinitely many values
variable? and the collection of values is not countable.
What is the first requirement of a There is a numerical random variable x, and its
probability distribution? values are associated with corresponding
probabilities such that ∑P(x) = 1.
What is the second requirement of a 0 ≤ P(x) ≤ 1 for every individual value of the random
probability distribution? variable x.
In the example of two births, what is The number of females when two babies are born.
the random variable x?
What are the possible values of x in 0, 1, or 2 females.
the two births example?
What does a probability histogram It visually represents a probability distribution with
depict? probabilities on the vertical scale.
