Question

20. Write the formula to find the Median of grouped data and explain the terms in it


​

Answer 1

Answer:

The formula for median in a grouped data is median=l+(n2−cff)×h, where l represent the lower limit of the median class, n represents the total sum of all frequencies, cf represent the cumulative frequency before the median class, f represent the frequency of the median class and h represents the class width.

Answer 2

Answer:

The formula for median in a grouped data is median=l+(n2−cff)×h.

Step-by-step explanation:

Following are the steps in the calculation of median for grouped frequency distribution

Prepare a table containing three columns

Write given class intervals in column 1 and their respective frequencies in column 2.

Write cumulative frequency less than type in column 3.

Find total frequency N= ∑fi , Calculate

2

N

Find cumulative frequency less than type which is just greater than or equal to

2

N

. The corresponding class is 'median ' class

Calculate the value of median by using the formula.