Vocabulary Word | Definition |
data | information collected about people or things |
survey | a set of questions that is used to gather information |
sample | a part of the group that is chosen to represent the whole group, or population |
random sample | a sample for which every person in the population has an equal chance of being chosen |
cumulative frequency | a running total of frequencies |
outlier | a data value that is well-separated from other data values in a set |
mean | an average of a group of numbers |
median | the middle number when data are arranged in order |
mode | the number or item that occurs most often in a set of data |
stem-and-leaf plot | a graph that organizes data by place |
pictograph | a graph that uses 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 data in part or all of the graph |
circle graph | a graph that show how parts of the data are related to the whole and to each other |
scale | series of numbers placed at fixed distances on a graph |
interval | the difference between oe number and the next on the scale |
ordered pair | a pair of numbers used to locate a point on a grid |
histogram | a bar graph that shows the frequency data occur within intervals |
mean | the average of a set of numbers, found by dividing the sum of the set by the number of addends |
median | the middle number in a set of data that are arranged in ordered |