Fall 2024 Semester Review

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What is the probability of an event?

Back

The probability of an event is a measure of the likelihood that the event will occur, expressed as a number between 0 and 1.

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How do you calculate the probability of an event given a condition?

Back

Use the formula: P(A|B) = P(A and B) / P(B), where P(A|B) is the probability of A given B.

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What is a normal distribution?

Back

A normal distribution is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

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What is the mean in a data set?

Back

The mean is the average of a set of numbers, calculated by dividing the sum of all values by the number of values.

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What is standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values.

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How do you find the probability of a score falling within a range in a normal distribution?

Back

Use the z-score formula to find the standard score, then refer to the standard normal distribution table.

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What is a two-way frequency table?

Back

A two-way frequency table displays the frequency counts of two categorical variables, allowing for the analysis of the relationship between them.

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How do you calculate conditional probability from a two-way frequency table?

Back

Divide the frequency of the event of interest by the total frequency of the condition.

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What is a permutation?

Back

A permutation is an arrangement of objects in a specific order, where the order matters.

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How do you calculate permutations of selecting r objects from n?

Back

Use the formula: P(n, r) = n! / (n - r)!, where n is the total number of objects and r is the number of objects to arrange.