Calculate range, standard deviation and coefficient of variation of marks secured by students.

Calculate the standard deviation and coefficient of variation .

Find out standard deviation and coefficient of variation .

Calculate the standard deviation and coefficient of variation of age of members of a society .

Calculate the standard deviation and coefficient of standard deviation of the following series:

Find the mean ,standard deviation and coefficient of variation for the following frequency distribution .

Following are the marks obtained by 10 students of a class. Calculate standard deviation and coefficient of standard deviation.