Statistical Terms

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Box-and-whisker plot

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A graphical representation of data that shows the distribution through their quartiles. It highlights the median, upper and lower quartiles, and the minimum and maximum data points.

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Stem-and-leaf plot

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A plot that displays quantitative data by splitting each data point into a 'stem' and a 'leaf'. It helps in visualizing the shape of a distribution.

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Line plot

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A type of graph that displays data along a number line, often used to show frequency of data points.

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Mean

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

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Median

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The middle value in a list of numbers, which separates the higher half from the lower half.

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Mode

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The value that appears most frequently in a data set.

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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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MAD (Mean Absolute Deviation)

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A measure of variability that represents the average distance between each data point and the mean of the data set.

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IQR (Interquartile Range)

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A measure of statistical dispersion, or spread, which is the difference between the upper quartile (Q3) and the lower quartile (Q1).