Math, asked by thirumalaiakshay123, 2 months ago

find the median
Class 1 - 19 21 - 39 41 - 59 61 - 79 81 - 99 101 - 119 121 - 139

Frequency 6 8 10 12 6 5 3​

Answers

Answered by amitnrw
1

Given :

Class          1 - 19 21 - 39 41 - 59 61 - 79 81 - 99 101 - 119 121 - 139

Frequency    6        8          10           12     6             5         3​

To Find : Median of Data

Solution:

Interval         f           cf

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  

Total data = 50

50/2 = 25

25 lies in 60 - 80

Median = 60  +  20 x ( 25 - 24)/12

= 60 +  1.67

= 61.67

Median = 61.67

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