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17 Cards in this Set
- Front
- Back
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bar graph
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a bar graph is a chart that contains two or more categories along one axis and a series of bars, one for each category, along the other axis
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class mark
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another name for class midpoint; the midpoint of each class interval in grouped data
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class midpoint
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for any given class interval of a frequency distribution; the average of the two class endpoints
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cumulative frequency
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a running total of frequencies through the classes of a frequency distribution
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dot plot
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statistical chart where each data value is plotted along the horizontal axis and is represented on the chart by a dot.
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frequency distribution
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a summary of data presented in the form of class intervals and frequencies.
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frequency polygon
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a graph constructed by plotting a dot for the frequencies at the class midpoints and connecting the dots
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grouped data
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data that have been organized into a frequency distribution
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histogram
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vertical bar chart constructed by graphing lines for the frequencies of classes across the class intervals and connecting each to the x axis to form a series of rectangles
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ogive
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cumulative frequency polygon
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pareto chart
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a vertical bar chart in which the number and types of defects for a product or service are graphed in order of magnitude from greatest to least
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pie chart
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a circular depiction of data where the area of the while pie represents 100% of the data being studied and slices represent a percentage breakdown of the sublevels
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range
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the difference between the largest and the smallest values in a set of numbers
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relative frequency
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the proportion of the total frequencies that fall into an given class interval in a frequency distribution
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scatter plot
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a plot or graph of the pairs of data from a simple regression analysis
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steam and leaf plot
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a plot of numbers constructed by separating each number into two groups a steam and a leaf.
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ungrouped data
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raw data, or data that have not been summarized in any way
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