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12 Cards in this Set
- Front
- Back
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This type of distribution lists each category of data and the number of occurrences for each category. |
Frequency Distribution |
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This is the proportion (or percent) of observations within a category and is found using the formula:
Frequency/Sum of All Frequencies |
Relative Frequency |
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This type of distribution lists each category of data together with the relative frequency. |
Relative Frequency Distribution |
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This type of graph is constructed by labeling each category of data on either the horizontal or vertical axis and the frequency or relative frequency of the category on the other axis. Rectangles of equal width are drawn for each category. The height of each rectangle represents the category's frequency or relative frequency. |
Bar Graph |
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This type of graph is one whose bars are drawn in decreasing order of frequency or relative frequency. |
Pareto Chart |
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This type of graph is a circle divided into sectors. Each sector represents a category of data. The area of each sector is proportional to the frequency of the category. The formula for determining the sector angle is:
(Relative Frequency)360° ≈ Sector Angle |
Pie Chart |
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Categories of data |
Classes |
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This is constructed by drawing rectangles for each class of data. The height of each rectangle is the frequency or relative frequency of the class. The width of each rectangle is the same and the rectangles touch each other. |
Histogram |
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(Largest Data Value - Smallest Data Value)/Number of Classes ≈ Class Width |
Process to Determine Class Width |
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This type of graph uses the digits to the left of the rightmost digit to form the stem. Each rightmost digit forms a leaf. |
Stem-and-Leaf Plot |
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This type of graph is created by placing each observation horizontally in increasing order and placing a dot above the observation each time it is observed. Though limited in usefulness, they provide a quick picture of the data. |
Dot Plot |
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This type of graph is obtained by plotting the time in which a variable is measured on the horizontal axis and the corresponding value of the variable on the vertical axis. Line segments are then drawn connecting the points. |
Time-Series Plot |
