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23 Cards in this Set
- Front
- Back
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bar chart
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a graphical display of data that uses the height of a vertical bar above a given point as an indicator of frequency or relative frequency
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bimodal
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describes the shape of a distribution of values when the distribution of has two modes or "peaks"
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cumulative frequency distribution
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a data display that shows the number of data set members that are at or below a particular value (or that are at or above)
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cumulative relative frequency distribution
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a data display that shows the proportion of data set members at or below a particular value, (or that are at or above)
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descriptive statistics
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a branch of statistics that involves finding ways to summarize, describe and present data
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dispersion
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the degree of variation in the values that make up a data set
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frequency curve
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the graph that results form smoothing a frequency polygon and creating a continuous contour
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frequency distribution
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a data display that shows the number of data set members having a particular value
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frequency polygon
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the graph that results when the tops of the bars in a frequency bar chart or histogram are connected by straight lines segments
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grouped data
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data points clustered together in manageable groups or intervals for ease and effectiveness of presentation
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histogram
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a bar chart for grouped data
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kurtosis
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the degree of steepness or peakedness in a frequency or relative frequency distribution
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mean
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the central point in a data set that balances distances of data set members to the left with distances of data set members to the right
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mean absolute deviation (MAD)
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a measure of dispersion; the avg absolute distance of data set members from the mean
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median
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the data set mid-point
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mode
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most frequent number
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range
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a measure of dispersion; difference between largest and smallest value
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relative frequency distribution
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a data display that shows the proportion of data set members that have a particular value
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skewness
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the degree to which a data distribution has one extended "tail" showing either unusually large or unusually small values
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standard deviation
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a measure of dispersion; square root of the variance
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symmetric
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describes the shape of a distribution of values when one side of the distribution is the mirror image of the other
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unimodal
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describes the shape of a distribution of values when the distribution has only one mode or "peak"
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variance
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a measure of dispersion; the avg squared distance values in the data set from the mean
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