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Chapter 3: Measures of Variability
143
Software Formula
It is computed from the following formula. In the formula,
n
represents the
sample size,
x
represents the value of the variable, and
x-bar
represents the
sample mean.
We can also use the
Basic Statistics
workbook to compute the skewness
using the “software formula”. If we did for the previous example, then the
skewness will be approximately equal to 0.8192. This is shown in
Figure 3-33
.
Figure 3-33:
Software Formula Skewness for
Example 3-17
Section Review
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