If MINITAB is used to find skewness and kurtosis values for the four variables, the following results are obtained by using the pull-down menu ‘‘Stat ) Basic statistics ) Display descriptive statistics.’’
Descriptive Statistics: Height, Wedage, Obitage, Cola-fill
Variable
N
N*
Mean
StDev
Skewness
Kurtosis
Height
50
0
65.120
2.911
-0.02
-0.61
Wedage
35.48
13.51
1.98
4.10
Obitage
74.20
20.70
-1.50
2.64
Cola-fill
12.056
0.284
0.02
-1.19
The skewness values for the uniform and normal distributions are seen to be near 0. The skewness measure is positive for a distribution that is skewed to the right and negative for a distribution that is skewed to the left.
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