StatisticsStatistics

Cumulative Frequency & Median Class

Find the median class from cumulative frequencies.

f₁4

f₂7

f₃10

f₄5

Class width10

Cumulative frequencies

4, 11, 21, 26

N/2

Median class

20 – 30

Median

Frequency distribution — mean & median markersCumulative frequencies: 4, 11, 21, 26

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Median = l + [(N/2 − cf) / f] × h.

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