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Chapter 13

Vocabulary from Ch. 13

Median the middle value of a data set, or the mean of the two middle values of a data set
Lower Quartile the median of the lower half of a data set
Upper Quartile the median of the upper half of a data set
Box Plot a type of graph that shows how data are distributed by using the least value, the lower quartile, the median, the upper quartile, and the greatest value
Mean Absolute Deviation the mean of the distances of data values from the mean of the data set
Measure of Variability a single value used to describe how spread out a set of data values are. Mean Absolute Deviation, Range, and Interquartile Range are examples.
Range the difference between the greatest value and the least value in a data set
Interquartile Range the difference between the upper quartile and the lower quartile of a data set
distribution the overall shape of the data set