Question

find the median of the following data 20-40,40-60,60-80,80-100
frequency 7,15,20,8

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Answer 1

Answer:

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Median of Grouped Data

Find the median of the foll...

STATISTICS

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Asked on December 20, 2019 by

Sherine Mallick

Find the median of the following data:

Class interval 0−20 20−40 40−60 60−80 80−100 100−120 120−140

Frequency 6 8 10 12 6 5 3

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ANSWER

ClassInterval Frequency c.f.

0−20 6 6

20−40 8 14

40−60 10 24

60−80 12 36

80−100 6 42

100−120 5 47

120−140 3 50

N=50

Here, N=50, then

2

N

=

2

50

=25

∴ Median class =60−80

We have, l=60,c.f=24,f=12 and h=20

Median=l+

f

2

N

−c.f

×h

=60+

12

25−24

×20

=60+1.66

=61.66

Answer 2

Answer:

Step-by-step explanation:60-50 = 10