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| Average | The sum of two or more quantities divided by the number of quantities; the mean.
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| Box Plot | A diagram that is constructed using five values.
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| Cluster | Data that are grouped closely together.
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| Distribution | The arrangement of data values.
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| Dot Plot | A diagram that shows the frequency of data on a number line. Also known as a line plot.
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| First Quartile | The first quartile is the median of the data values less than the median.
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| Gap | An empty space or interval in a set of data.
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| Histogram | A type of bar graph used to display numerical data that have been organized into equal intervals.
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| Interquartile Range (IQR) | A measure of variation in a set of numerical data, the interquartile range is the distance between the first and third quartiles of the data set.
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| Mean | The sum of numbers in a set of data divided by the number of pieces of data.
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| Mean Absolute Deviation | A measure of variation in a set of numerical data, computed by adding the distances between each data value and the mean, then dividing by the number of data values.
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| Measures Of Center | Numbers that are used to describe the center of a data set. These measures include the mean and median.
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| Measures Of Variation | A measure that is used to describe the variability, or spread, of a data set.
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| Median | A measure of center in a set of numerical data. The median of a list of values is the value appearing at the center of a sorted version of the list, or the mean of the two central values, if the list contains an even number of values.
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| Outlier | A value that is much greater than or much less than the other values in a set of data.
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| Peak | The most frequently occurring value in a line plot.
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| Quartiles | Values that divide a data set into four equal parts.
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| Range | The difference between the greatest number and the least number in a set of data.
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| Second Quartile | Another name for the median, or the center of a set of numerical data.
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| Statistical Question | A question that anticipates and accounts for a variety of answers.
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| Statistics | Collecting, organizing, and interpreting data.
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| Symmetric Distribution | Data that are evenly distributed.
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| Third Quartile | The third quartile is the median of the data values greater than the median.
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