find mean,median and mode of given data,. **class marks** : 4,5,6,7,8,9,10. **frequency** : 3,5,8,13,11,9,7
Answers
Answer:
Mean=7.41, Median=7, Mode=8
Step-by-step explanation:
(x) (f) f.x c.f
4 3 12 3
5 5 25 8
6 8 48 16
7 13 91 29
8 11 88 40
9 9 81 49
10 7 70 56
Sum f= 56 Sum fx= 415
Mean= Sigma fx/Sigma f
=415/56
=7.41 approx
Now, Median
For calculating median, we have to find cumulative frequency first, we can see it in above table.
Total N=56 (Sum of frequency)
Formula for odd series = (n+1/2)th item
= (57/2)th item
= 28.5 th item
This lie between 16 and 29 in cumulative frequency
i.e median be 7
Now, Mode
The highest occuring frequency of series is to be mode
In this question highest frequency is 13 which occur in class 7
Therefore, mode=7
Answer:
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Step-by-step explanation:
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