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Chapter 2: Measures of Central Tendency
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Note:
The sum of the deviations from the mean for any data set is equal to zero.
We can again use the
Basic Statistics
workbook to compute the sum of the
deviations. The result is shown in
Figure 2-3
. Observe that this sum is zero
when the deviations were entered into the Data 1 column.
Figure 2-3:
Sum of the Deviations is equal to 0
for
Example 2-1
Note:
This property is true for any data set.
Next, a plot of the deviations from the sample mean is displayed in
Figure
2-4
.
Click here for the Basic Statistics Workbook