Question

Find the value of Standard deviation and
coefficient of variation from the following:-
Variables:
10,20,30,40,50,60,70
Frequency:
6,8,16,15,32,11,12​

Answer 1

Explanation:

Given:

Highest Value (H) =48

Lowest Value (L) =22

Range = Highest Value − Lowest Value

i.e R= H−  L

Substituting the given values in the formula.

R= 48 − 22 = 26

Coefficient of Range = H- LH + L=48-2248+22=2670=0.37                                                                    

Thus, range is 26 and coefficient of range is 0.37