Question

for given frequency distribution a= 325 = c= 50 £fivi = 28 and £fi = 200 and find x​

Answer 1

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Median of Grouped Data

Find the missing frequency ...

STATISTICS

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Asked on December 27, 2019 by

Anoothi Kankate

Find the missing frequency in the following distribution if N=100 and median is 32

Marks

0-10

10-20

20-30

30-40

40-50

50-60

Total

No. of students

10

?

25

30

?

10

100

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ANSWER

class f cf

0-10 10 10

10-20 x 10+x

20-30 25 35+x

30-40 30 65+x

40-50 y 65+x+y

50-60 10 75+x+y

75+x+y

75+x+y=100

x+y=25

f=30,h=10,cf=35+x,

2

n

=50

Median=l+(

f

2

n

−cf

)×h

32=(

30

50−35−x

)×10

32−30=

3

15−x

6=15−x

x=9

∴y=16

Step-by-step explanation:

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