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What is the formula for median of grouped data?

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l + h × N 2 − c f f

l + h × c f − N 2 f

l − h × N 2 − c f f

None of these

answer is A.

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Detailed Solution

We know that the formula for median is,

M = l + h × N 2 − c f f

, where,

l

=lower limit of the median class,

h

=size of the median class,

f

= frequency of the median class,

N

= sum of frequencies and

c f

=cumulative frequency of the class just preceding the median class.
Therefore,

M e d i a n = l + h × N 2 − c f f

.
Therefore, the correct answer is option 1.

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