| A | B |
|---|
| pictographs | use symbols or pictures and a key to display numeric data |
| bar graphs | use vertical or horizontal bars to compare numeric data |
| line graphs | show how data changes over time |
| circle graphs | round graphs that show how parts of a data set compare to the whole and to each other |
| scale | a ruler used to measure the data in a graph |
| interval | the difference between one number and the next on a scale |
| x-axis | the horizontal (across) axis |
| y-axis | the vertical (up and down) axis |
| scatterplots | show paired data values |
| trend | relationship between 2 sets of data that shows up as a pattern in a scatterplot |
| tally marks | used to organize a large set of data |
| frequency charts | show each value that appears in a data set with the number of times it appears |
| line plots | show the shape of a data set by stacking X's above values on a number line |
| range | difference between the highest and lowest values in a data set (1 number) |
| stem-and-leaf diagrams | show the shape of a data set by breaking each value into a 'stem' part and a 'leaf' part |
| mean | sum of the values of a data set divided by the number of values |
| median | middle value in an ordered data set |
| mode | the value(s) that appear most often in a data set |
| outlier | a number very different from the others in a data set |
