Question

The formula to calculate median using cf is?​

Answer 1

Answer:

How do you Calculate Median of Grouped Frequency Distribution

Median of Grouped Frequency Distribution

Median = ℓ + \frac{{\frac{N}{2} – C}}{f}\,\, \times \,\,h

where,

ℓ = lower limit of median class interval

C = cumulative frequency preceding to the median class frequency

f = frequency of the class interval to which median belongs

h = width of the class interval

N = f1 + f2 + f3 + … + fn.

Working rule to find median

Step 1: Prepare a table containing less than type cumulative frequency with the help of given frequencies.

Step 2 : Find out the cumulative frequency to which \frac{N}{2} belongs. Class-interval of this cumulative frequency is the median class-interval.

Step 3 : Find out the frequency f and lower limit l of this median class.

Step 4 : Find the width h of the median class interval

Step 5 : Find the cumulative frequency C of the class preceding the median class.

Step 6 : Apply the formula,

Median = ℓ + \frac{{\frac{N}{2} – C}}{f}\,\, \times \,\,h to find the median

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