1.

Find the mode of the following data.Class internal Frequency0 - 1010 - 2020-3030-4040 - 506.91591N= 40​

Answer»

Step-by-step explanation:

Class intervals Frequency

10-20 7

20-30 12

30-40 20

40-50 11

50-60 8

Here MAXIMUM frequency is 20 ,the class CORRESPONDING to this 30-40

So MODAL class is 30-40

Now lower limit of modal class (l)=30

Frequency (f1) of modal class =20

frequency (f0) of PRECEDING the modal class =12

frequency (f2) of the class succeeding the modal class=11

Class size=10

Mod=l+[

2f1−f0−f2

f1−f0

]×h

Mod =30+[

2×20−12−11

20−12

]×10=30+

17

8

×10=30+4.705=34.705



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