Week 16 Skewness,Kurtosis,Describing a frequency distribution

Skewness:

Lack of symmetry is called skewness. If a distribution is not symmetrical then it is called a skewed distribution. So, the mean, median and mode are different in value and one tail becomes longer than the other. The skewness may be positive or negative.

  • Positively Skewed Distribution
  • Negatively Skewed Distribution

Kurtosis:

Karl Pearson introduce the term Kurtosis for the degree of peakedness or flatness of a frequency curve.
 

Describing a frequency distribution:

To describe a major characteristics of a frequency distribution, we need the calculations of the following five quantities.

  • Sample size
  • Measure of central tendency
  • Measure of dispersion
  • Skewness
  • Kurtosis

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skewness-and-kurtosis.pptx (0.42 MB )