Class 10 Math All topics Statistics
The lengths of leaves of a plant are measured correct to the nearest millimetre, and the data obtained is represented in the following table:
 Length (in mm) Number of leaves
Find the median length of the leaves.
Solution:

The data needs to be converted to continuous classes for finding the median, since the formula assumes continuous classes. The classes then change to

Converting the given table into exclusive form and preparing the cumulative frequency table, we get

We have,

The cumulative frequency just greater than is  and the corresponding class is .

Thus,  is the median class such that
, and

Substituting these values in the formula
Median,

Hence, median length hours

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