Math, asked by agnesdhanushya15, 4 months ago

the number of students absent in a school was recorded everyday for 147 days and the row data was presented in the form of the frequency table

no.of days
5
6
7
8
9
10
11
12
13
15
18
20

no.of boys
1
5
11
14
16
13
10
70
4
1
1
1
find the median of the above data​

Answers

Answered by anumany1699
2

Answer:

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Answered by ranigani49041
3

Calculation of median

x  

i

​  

 f  

i

​  

 cf

5 1 1

6 5 6

7 11 17

8 14 31

9 16 47

10 13 60

11 10 70

12 70 140

13 4 144

15 1 145

18 1 146

20 1 147

∑f  

i

​  

=147  

We have,

⇒N=147⇒  

2

N

​  

=  

2

147

​  

=73.5

The cumulative frequency just greater than N/2 is 140 and the corresponding value of the variable x is 12.  

Hence, median = 12. This means that for about half the number of days, more than 12 students were absent.

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