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| Graph used to summarize qulitative data. Shows the amount of data that belong to each category as a proportional part of a circle. |
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| Graph used to summarize qulitative data. Shows the amount of data that belong to each category as a proportionally sized rectangle. |
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A bar graph with the bars arranged from the most numerous category to the least. Includes a line graph displaying th cumulative percentages and counts for the bars.
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| The frequency of each value of the variable. |
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Displays the data of a sample by representing each data with a dot positioned along a scale. This scale can be either horizontal or vertical. The frequency of the values is represented along the other scale.
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Displays the data of a sample using actual digits that make up the data values. Each numerical value is divided into two parts. The leading digits becom the stem, and the trailing digits become the leaf. The stems are locted along the main axis, and a leaf for each data value is located so as to display the distribution of the data.
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A listing, often expressed in chart form, that pairs each value of a variable with its frequency.
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A bar graph that represents the frequency distribution of a quantitative variable.
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Average. The sample mean is found by adding all the values of the variable x and dividing by the sample size. Represented by a bar over the letter X
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The value of the data that occupies the middle positon when the data are rank ordered. Represented b a tilde over X. To find the position, add 1 to the sample size and divide by 2.
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| The mode is the value of x that occurs most frequently. If the top frequency is ascribed to more than one X, there is no mode.
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The number exactly midway between the lowest and highest values. It is found by averaging the low and high values.
L+H/2 |
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Difference in value between the highest valued data and the lowest valued data.
Range = H - L |
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Difference between the value of a particular variable x and the mean of the whole set of variables
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The mean of the absolute values of the deviation from the mean
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The mean of the squared deviations from the mean.
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