Term
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Definition
If the data are numerical and you have relatively few data points, a dot plot may be a god way to display them. Each data point is represented by a dot placed over its value on the number line.
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Term
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Definition
This kind of data display, groups data points into ranges and shows how many of the data points fall in each range. All ranges or intervals in a histogram are of equal size, and they do not overlap.
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To create a histogram you need to create a frequency table. |
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Term
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Definition
A Frequency Table is a table that lists items and uses tally marks to record and show the number of times they occur.
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Term
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Definition
Is a value at the center or middle of a data set. Graphically, the center can be viewed as the "balance point" of the display. Algebraically, the most common ways to find the center are with the mean, median, or mode.
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Term
The MAD (Mean Absolute Deviation)
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Definition
One way to describe how far a value is from the mean is called the “deviation” from the mean. The Mean Absolute Deviation tells you “on average” how different the data values are away from the mean |
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Term
Steps to find the Mean Absolute Deviation
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Definition
1. Find the mean.
2. Find the distance between each data value and the mean.
3. Find the absolute value of the difference between each data value and the mean.
4. Find the average of those differences.
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