| A | B |
|---|
| cumulative frequency | a running total of frequencies |
| pictograph | a graph that used symbols or pictures and a key to display countable data |
| bar graph | a graph that displays countable data with vertical or horizontal bars; compares facts about groups of data |
| line graph | a graph that shows how data change over time |
| trend | a pattern over time--such as increasing, decreasing, or staying the same-- that is shown by the data in part or all of the graph |
| circle graph | a graph that shows how parts of the data are related to the whole and to each other |
| scale | a set of numbers placed at fixed distances on a graph |
| interval | the difference between one number and the next on a scale |
| ordered pair | a pair of numbers used to locate a point in a coordinate system |
| survey | set of information used to gather information about a group or to find the preference of a group |
| sample | part of the group that is chosen to represent the whole group, or population |
| population | the entire group being surveyed |
| random sample | a sample for which every person in the population has an equal chance of being chosen |
