Measures of Dispersion

What you need to learn in this topic

1. Determine the range, interquartile range, variance and standard deviation as a measure to describe dispersion of an ungrouped data.
2. Explain the advantages and disadvantages of various measures of dispersion to describe ungrouped data.
3. Construct and interpret the box plot for a set of ungrouped data.
4. Determine the effect of data changes on dispersion based on: (i) the value of measure of dispersion (ii) graphical representation
5. Compare and interpret two or more sets of ungrouped data, based on the appropriate measures of dispersion, hence make conclusion.
6. Solve problems involving measures of dispersion