 | Term | Definition |
| |
data |
Numerical information gathered for statistical purposes. |
| |
statistics |
The study of collecting, analyzing, and presenting data. |
| |
frequency table |
A table for organizing a set of data that shows the number of times each item or number appears. |
| |
interval |
The difference between successive values on a scale. |
| |
scale |
The set of all possible values of a given measurement, including the least and greatest numbers in the set, separated by the intervals used. |
| |
bar graph |
A graph using bars to compare quantities. The height or length of each bar represents a designated number. |
| |
line graph |
A graph used to show change and direction of change over a period of time. |
| |
circle graph |
A graph used to compare parts of a whole. The circle represents the whole and is separated into parts of the whole. |
| |
stem-and-leaf plot |
A system used to condense a set of data where the greatest place value of the data forms the stem and the next greatest place value forms the leaves. |
| |
stem |
The greatest place value common to all the data that is written to the left of the line in a stem-and-leaf plot. |
| |
leaf |
The units digit written to the right of the vertical line in a stem-and-leaf plot. |
| |
measures of central tendency |
Numbers or pieces of data that can represent the whole set of data. These common measures of central tendency are mean, median, and mode. |
| |
mean |
The sum of the numbers in a set of data divided by the number of pieces of data. |
| |
median |
The middle number in a set of data when the data are arranged in numerical order. If the data has an even number, the median is the mean of the two middle numbers. |
| |
mode |
The number or item that appears most often in a set of data. |
| |
range |
The difference between the greatest number and the least number in a set of data. |
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