Averages hide spread. This course measures dispersion and compares the consistency of data sets.
The course follows the NCERT Class 11 Mathematics chapter Statistics and has 2 lessons. Each lesson explains the ideas with worked examples and ends with practice questions and full answers. The numbers in every example and question are our own, so the lessons can be used alongside the textbook exercises.
- Range and Mean Deviation, Range and mean deviation about the mean and median for raw, discrete and grouped data.
- Variance, Standard Deviation and Mixed Practice, Variance and standard deviation, the step-deviation method, coefficient of variation, and a mixed practice set.
By the end you will be able to:
- Find the mean deviation about the mean and median.
- Find variance and standard deviation for raw and grouped data.
- Use the step-deviation method.
- Compare variability with the coefficient of variation.