Answer:
a) As = 0.67 right skewness
b) As = -0.75 left skewness
c) As = 0 ( Symmetric )
d) As = 0.1 ( slightly unsimmetric ) right skewness
Step-by-step explanation:
We will use the formula
As = skewness coefficient
μ = mean of distribution
Μ = median of distribution
And Pearson formula : As = ( μ - Μ) / σ
a) As = ( 10- 8 ) /3 =2/3 = 0.67
The distribution is right-skewness (positive skewness)
b) As = ( 42 - 45 ) / 4 = -3/4 = -0.75
The distribution is left skewness (negative skewness)
c) As = ( 18.6 - 18.6 )/ 1.5 = 0
The curve of the distribution is is symmetric
d) As = ( 98 - 97.6 ) / 4 = 0.4/4 = 0.1
The distribution is right skewness (slightly unsimmetric)
