Grade 9 Mean Deviation Worksheet
Understand and calculate mean deviation for various data sets.
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Grade 9 Mean Deviation Worksheet
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Read each question carefully and show all your work. Calculate the mean deviation for each data set as required.
1. Explain in your own words what mean deviation measures about a data set.
2. Mean deviation is the average of the absolute differences between each data point and the of the data set.
3. A higher mean deviation indicates that the data points are generally spread out from the mean.
4. Calculate the mean deviation for the following data set: 5, 8, 10, 12, 15
5. Which of the following is NOT a measure of dispersion?
Range
Mean Deviation
Median
Standard Deviation
6. A student recorded the following scores on 5 math tests: 75, 80, 85, 90, 70. Find the mean deviation of these scores.
7. A mean deviation of zero implies that all data points in the set are identical.
True
False
8. Two different classes took the same math quiz. Class A had scores: 60, 70, 80, 90, 100. Class B had scores: 78, 80, 82, 80, 80. Calculate the mean deviation for each class and determine which class had more consistent scores.
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