21 terms

line plot

a visual display of a distribution of data where each data value is shown as a dot or other mark, usually an "x" above the number line

whiskers

extend from each quartile to the extreme data points that are not outliers

box plot

uses a # to show the distribution of a set of data by using the median, quartiles, and extreme values

box

drawn around the quartile values

mean

the sum of the data divided by the # of pieces of data

dot plot

individual data values represented as dots above a number line

median

the middle number of the data set or two numbers multiplied by each other and divided by 2

mode

the # in the data set that occurs most often

measures of center

the mean, median, and mode

measures of variation

used to describe the distribution or spread of the data

quartiles

values that divide the data set into four equal parts

first quartile

the median of the data values less than the median

third quartile

the median of the data values greater than the median

interquartile range

the difference between the first and third quartiles of the data values

range

the difference between the greatest and the least data values

outlier

a data value that is either much greater or much less than the median

investigate

examine closely

data

information

variability

differences

recognize

know it when you see it

average

the sum of the items in a set of data divided by the # of items in the set; also called "mean"