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13 Cards in this Set
- Front
- Back
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Data Visualization
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A term used to describe the use of graphical displays to summarize and present information about a data set.
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Frequency Distribution
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A tabular summary of data showing the number (frequency) of observations in each of several nonoverlapping categories or classes.
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Relative Frequency Distribution
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A tabular summary of data showing the fraction or proportion of observations in each of several nonoverlapping categories or classes.
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Percent Frequency Distribution
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A tabular summary of data showing the percentage of observations in each of several nonoverlapping classes.
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Class Midpoint
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The value halfway between the lower and upper class limits.
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Histogram
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A graphical display of a frequency distribution, relative frequency distribution or percent frequency distribution of quantitative data constructed by placing the class intervals on the horizontal axis and the frequencies, relative frequencies or percent frequencies on the vertical axis.
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Cumulative Frequency Distribution
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A tabular summary of the quantitative data showing the number of data values that are less than or equal to the upper class limit of each class.
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Cumulative Relative Frequency Distribution
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A tabular summary of quantitative data showing the fraction or proportion of data values that are less than or equal to the upper class limit of each class.
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Cumulative Percent Frequency Distribution
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A tabular summary of quantitative data showing the percentage of data values that are less than or equal to the upper class limit of each class.
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Crosstabulation
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A tabular summary of data for two variables. The classes for one variable are represented by the rows; the classes for the other variable are represented by the columns.
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Simpson's Paradox
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Conclusions drawn from two or more separate crosstabulations that can be reversed when the data are aggregated into a single crosstabulation.
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Relative Frequency Formula
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Frequency of the class/n where n is the number of observations
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Approximate Class Width
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Largest data value - Smallest data value/ Number of classes
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