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# Statistics Vocab

### Math Statistics Vocabulary

definitionterm
the difference between the greatest value and the least value in a set of data range
the average distance between each data value and the mean mean absolute deviation
a description of how spread out the data in a set are variability
the data value(s) the occurs most often in a set of data mode
the sum of all data values divided by the total number of data values; average mean
the difference between the first and third quartiles interquartile range
a way of displaying data on a number line to show the distribution of a data set box plot or box-and-whisker-plot
a single value that is used to represent a collection of data; mean, median, mode measure of center
the middle value in a set of data values that are written in order from least to greatest median
the organization of a data set distribution
Which measure of center is best when the data is symmetrical? Mean
Which measure of variation/variability is best when the data is symmetrical? Mean absolute deviation
Which measure of center is best when the data is skewed? Median
Which measure of variability/variation is best when the data is skewed? Interquartile range
Which measure of center is best for categorical data? Mode
Which measure of variation/variability is best for categorical data? Range