22 terms

# Pre-Algebra Chapter 9 Vocabulary

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Measures of Central Tendency
The statistics mean, median, & mode
Mode
The data item with the greatest frequency. (occurs most often)
Median
The middle value when the data are in numerical order
Mean
The sum of the data divided by the total number of data items.
Average
Another term for "mean" of data
Outlier
A data item that is much higher or lower than the rest of the data
Frequency
The number of times a data item occurs
Frequency Table
A chart/table that lists each data item with its frequency
Line Plot
A number line that shows x's for the frequency
Histogram
A special type of bar graph used to show frequency of data
Stem-and-Leaf Plot
Shows data items in order
Range
The difference between the greatest and least values in a set of data
Box-N-Whiskers Plot
Shows the distribution of data on a number line
Quartiles
Values that divide the data into two equal parts
Scatter Plot
Related data from two different sets is graphed as points
Trend Line
A line that closely fits the data points in a scatter plot
Positive Trend
As one set of values increases, the other set tends to increase
Negative Trend
As one set of values increases, the other set tends to decrease
No trend
The two values do not have a relationship
Bar Graph
A graph used when comparing amounts
Legend
Another name for a "key", used for graphing
Line Graph
A graph used to show changes over time