Question

A series has its mean as 15 and its coefficient of variation as 20, its standard deviation is
Option 1 :
10
Option 2 :
3
Option 3 :
7
Option 4:
5​

Answer 1

. 3. 5. 7. 9. 11. 13. 15. Frequency (f):. 3. 3. 4. 14. 7. 4. 3. 4. Solution Mean = x = 3 9 20 98 63 ... Example 2 Find the variance and standard deviation for the following data: 57, 64, 43, 67, .