Direction Of Skewness Of A Frequency Distribution. If the tail is to the left then it is a negatively skewed distribution. In a skewed distribution the curve is extended to either left or right side.
Reflect the other then it is skewed. If the distribution is symmetric then it has a skewness of 0. If the tail is to the left then it is a negatively skewed distribution.
If the tail is to the right it is a positive skew.
Although positive or negative skewness can be detected graphically depending on whether the right tail or the left tail is longer but we dont get idea of the magnitude. The skewness of the given distribution is on the left. Generally we can then say that the frequency of some data value x i is the same as the frequency of some other data value x i d i where x i d i 2 halfway between x i and x i d i is the mean μ. Although positive or negative skewness can be detected graphically depending on whether the right tail or the left tail is longer but we dont get idea of the magnitude.
