| A | B |
|---|
| mean | the sum of all values divided by the number of values |
| median | the middle value in a data set; the average of the middle values if there are an even number of values |
| mode | the value in a data set that occurs most often |
| range | the difference of the greatest and least values in a data set |
| interquartile range | the difference between the uper and lower quartiles in a box and whisker plot |
| box and whisker plot | data display that divides data into four parts (quartiles) |
| line graph | a data display used to show how quantity changes over time |
| bar graph | data display used to represent and compare categorical data |
| histogram | data display used to represent and compare numerical data from a frequency table |
| circle graph | a data display that uses sections of a circle to visually represent the data |
| quartiles | values that divide a set of data into four equal parts |
| stem and leaf plot | a data display that uses the last digit and the remaining digits to show how data values are distributed |
| frequency table | a table used to group data values by intervals |
| upper quartile | the median of the upper half of the data set |
| lower quartile | the median of the lower half of the data set |
| pictograph | a data display that uses symbolic figures to match the frequencies of different kinds of data |
| lower extreme | the least value in a data set |
| upper extreme | the greatest value in a data set |
| outlier | a value in a data set distinctly stands out as being much greater or much less than the other values |
| data | information, facts, or numbers that describe something |
| line plot | A number line with X's or other marks to show frequency of data |
| intervals | used to separate the data scale into equal parts |
