# Ch15. Statistics

In this self study course, you will learn measures of Dispersion: Range, Mean deviation, variance and standard deviation of ungrouped/grouped data. Analysis of frequency distributions with equal means but different variances. For further understanding of concepts and for examination preparation, this course has explanation of all NCERT Exercise questions. Also, there is practice assignment that has questions from Boardâ€™s Question Bank, RD Sharma, NCERT Exemplar etc. instead of only one book. The PDF of assignment can be downloaded within the course.