A graphic form using bars to make comparisons of statistics.
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cumulative frequency
The sum of frequencies of all proceeding events.
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distribution
A graph for table that shows the theoretical frequency of each possible data value.
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dot plot
A diagram that shows the frequency of data on a number line; also called a line plot.
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frequency table
A chart that indicates the number of values in each interval.
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histogram
A graphical display that uses bars to display numerical data that have been organized into equal intervals.
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joint frequencies
In a two-way frequency table, joint frequencies display the frequency of two conditions happening together.
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linear transformation
One or more operations performed on a set of data that can be written as a linear function.
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marginal frequency
In a two-way frequency table, marginal frequencies are totals for each row or column.
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mean
The sum of numbers in a set of data, divided by the numbers of items in a data set.
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measures of center
Measures of average (also called central tendency). The most common are mean, median, and mode.
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median
The middle number in a set of data when the data are arranged in numerical order. If the data set has an even number, the median is the mean of the two middle numbers.
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mode
The number(s) that appear most often in a set of data.
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percentile
A measure that tells what percent of a data set are below a reported value in the set.
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qualitative data
Data that can be categorized, but not measured.
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quantitative data
Data that can be measured.
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relative frequency
The number of times in event occurred compared to the whole.
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skewed distribution
When the majority of data is on the left or right side.
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standard deviation
The square root of the variance.
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symmetric distribution
when data is evenly distributed.
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two-way frequency table
The table used to organize the frequency of data in two categories.
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