139 / 762
Chapter 3: Measures of Variability
139
Section Review
3-8 Measuring Skewness
Recall in
Chapter 2
we discussed different shapes. They included
symmetrical, right or positively skewed, and left or negatively skewed
distributions. A review of these shapes is given in the next three figures.
For a
symmetrical distribution:
Mean = Median = Mode.
Figure 3-29
displays an example of a symmetric distribution.
Figure 3-29:
Symmetric Distribution
For a
positively (right) skewed distribution:
Mode < Median < Mean.
Figure 3-30
displays an example of a right skewed distribution.
e-Self Review