Probability and Statistics Vocabulary

Fill in the blank: In probability, a ______ is an event that is certain to happen, meaning that the probability of the event occurring is 1.

• certain event

• impossible event

• random event

• independent event

Fill in the blank: ______ are events that affect the probability of other events, or whose probability is affected by other events, For example, if you draw two balls from a bag without replacing the first ball, the probability of drawing a green ball in the second draw depends on the color of the first ball.

• Dependent events

• Independent events

• Mutually exclusive events

• Impossible events

Fill in the blank: An ______ is a set of possible outcomes of an experiment.

• event

• variable

• sample

• mean

Fill in the blank: ______ means each outcome has the same probability of occurring.

• Equally likely as not

• Impossible

• Certain

• Unlikely

Fill in the blank: ______ is the likelihood of an event occurring based on the number of times the event occurs in an experiment divided by the total number of trials.

• Experimental Probability

• Theoretical Probability

• Relative Frequency

• Random Variable

Fill in the blank: An ______ is an event that cannot happen, and has a probability of zero.

• impossible event

• certain event

• random event

• likely event

Fill in the blank: ______ are independent if the occurrence of one does not affect the probability of the other. For example, if you roll a die twice, the outcome of the first roll and second roll have no effect on each other.

• Two events

• Two numbers

• Two outcomes

• Two probabilities

Fill in the blank: ______ is a measure of the spread of data, also known as statistical dispersion.

• Interquartile Range

• Mean

• Mode

• Median

Fill in the blank: ______ is an event that has a probability between 0.5 and 1, meaning it will probably occur.

• Likely

• Impossible

• Unlikely

• Certain

Fill in the blank: ______ is the mathematical average of two or more numbers.

• Mean

• Median

• Mode

• Range