5 students obtained following marks in Statistics:
20,35,25,30,15
Find out range and coefficient of range.

In an examination, 25 students obtained the following marks. Find out coefficient of range of the marks.

60 students of Section A of Class XI, obtained 40 mean marks in Statistics, 40 students of Section B obtained 35 mean marks in Statistics. Find out mean marks in Statistics for Class XI as a whole.

Find the range and the coefficient of range of the following data.

Marks obtained by 100 students of a class are given below. Find out range and coefficient of range of the marks.

Following are the marks obtained by 20 students in statistics. Find out coefficient of variation of the marks.

Find out the range and the coefficient of range of the following series:

Find out the range the coefficient of range from the following data:

The marks obtained by 7 students in Science test are given below : 24,22,30,28,32,26,34 Find the range, mean. Median and mode.

Find out the range and the coefficient of range ,given the following data-set: