Measures of Center & Data Displays

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range

the difference between the greatest number and the least number in a set of numbers

median

the middle number of a set of numbers when the numbers are arranged least to greatest, or the mean of the two middle numbers when the set has two middle numbers

mode

the number that occurs most often in a data set

mean

the sum of a set of numbers divided by the number of elements in the set; an average

histogram

a bar graph in which the labels for the bars are numerical intervals

data set

a collection of numbers or values that relate to a particular subject

line plot

a graph that shows the frequency of data along a number line

bar graph

a graph that uses horizontal or vertical bars to display data

dot plot

a graphical display of data using dots

outlier

a value much greater or much less than the others in a data set

average

another term for mean


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