Q. Stsndard deviation is defined as (Solved)
1. Mean of deviations taken from the value of mean
2. Mean of deviations taken from value of median
3. Square root of average of squares of deviations taken from the value of mean
4. Square root of average of squares of deviations taken from the value of median
- c. Square root of average of squares of deviations taken from the value of mean