 | Term | Definition |
| |
Median |
The middle number in a set of data when the data is arranged in numerical order. |
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Mode |
The number or numbers that appear most often in a set of data |
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Outlier |
A piece of data that is quite separated from the rest of the data. |
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Range |
The difference between the greatest and least numbers in a data set. |
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Scale |
The set of all possible values of a given measurement. |
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Scatter Plot |
Two sets of related data are plotted as ordered pairs on the same graph. |
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Statistics |
The study of collecting, organizing and interpreting data. |
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Stem |
The greatest place value common to all the data values used for the stem of a stem-and-leaf plot. |
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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. |
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Upper extreme |
The greatest number of a set of data. |
| |
Upper quartile |
The median of the upper half of a set of numbers, indicated by UQ. |
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Lower Quartile |
The median of the lower half of a set of numbers, indicated by LQ. |
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Mean |
The sum of the data divided by the number of itmes in the data set. |
| |
Measures of central tendency |
Numbers that are used to describe the center of a set of data. |
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Bar graph |
A graphic form using bars to make comparisons of statistics. |
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Box-and-whisker plot |
A diagram that summarizes data using the median, the upper and lower quartiles and the wxtreme values. |
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Cluster |
Data that are grouped closely together. |
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Data |
Pieces of information, often numerical, which are gathered for statistical purposes. |
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Frequency table |
A table for organizing a set of data the shows the number of pieces of data that fall within given intervals or categories. |
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Histogram |
A special kind of bar graph in which the bars are used to represent the frequency of numerical data that have been organized in intervals. |
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Interquartile range |
The range of the middle half of a set of numbers (UQ-LQ) |
| |
Interval |
On a scale, the difference between the greatest and least values in each category. |
| |
Leaf |
The second greatest place value of data in a stem-and-leaf plot. |
| |
Line graph |
A type of statistical graph using lines to show how values change over a period of time. |
| |
Line plot |
A diagram that shows the frequency of data. |
| |
Lower extreme |
The least number of a set of data. |
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