Statistics Vocabulary

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Mode

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The value that appears most frequently in a data set.

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Mean

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The sum of all values in a data set divided by the number of values; also known as the average.

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Average

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A measure of central tendency, often referring to the mean.

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Median

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The middle value in a data set when the values are arranged in ascending or descending order.

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Range

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The difference between the highest and lowest values in a data set.

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Interquartile Range

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The difference between the first quartile (25th percentile) and the third quartile (75th percentile) in a data set.

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Skewed

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A distribution that is not symmetrical, where one tail is longer or fatter than the other.

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Variability

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The extent to which data points in a data set differ from the mean or from each other.

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Distribution

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The way in which values in a data set are spread or dispersed.