Home › CBSE Class 11 › Mathematics › Statistics and Probability › For grouped data, standard deviation is found by…
For grouped data, standard deviation is found by replacing each class by its:
AMid-point
BMax point
CMin point
DEnd point
Answer & Solution
Correct answer: A. Mid-point
1. A class covers a range of values, not a single one.
2. Each class is replaced by its mid-point.
3. The standard deviation is then calculated as usual.
_Source: NCERT Class 11 Mathematics, Ch 15 'Statistics'_
Related questions
Dispersion is measured on the basis of the observations and the:Comparing series measured in different units needs a measure independent of:Which of these is NOT a measure of central tendency?A series with the lesser coefficient of variation is more:A series with the greater coefficient of variation is more:The coefficient of variation requires that the mean is not:The coefficient of variation is which ratio times 100?The measure of variability that is independent of units is the: