Making a Discrete Probability Distribution

Front

What is a discrete probability distribution?

Back

A discrete probability distribution is a statistical distribution that describes the likelihood of outcomes of a discrete random variable, where the variable can take on a countable number of values.

Front

What is the sum of probabilities in a discrete probability distribution?

Back

The sum of the probabilities of all possible outcomes in a discrete probability distribution must equal 1.

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How do you calculate the probability of an event in a discrete probability distribution?

Back

The probability of an event is calculated by summing the probabilities of all outcomes that constitute that event.

Front

What does it mean to trap fewer than 3 mice in a probability distribution?

Back

It means calculating the sum of probabilities for outcomes where the number of mice caught is 0, 1, or 2.

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What is the probability of trapping at least one mouse?

Back

The probability of trapping at least one mouse is calculated as 1 minus the probability of trapping zero mice.

Front

What is the probability of a test score being 2 or less in a rubric from 0 to 4?

Back

It is the sum of the probabilities of scoring 0, 1, or 2.

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What is the probability of a test score being exactly 4?

Back

It is the probability assigned to the outcome where the score is 4.

Front

What does the notation X ≥ 1 represent in a probability distribution?

Back

It represents the event where the random variable X takes on a value of 1 or more.

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What is the probability of a random variable being less than a certain value?

Back

It is the cumulative probability of all outcomes less than that value.

Front

What is the role of a probability mass function (PMF)?

Back

A PMF defines the probability of each possible value of a discrete random variable.