guys I need ur help! pls answer it ASAP
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Answered by
0
15+17+f+12+9+5+2/7
=f+60/7
f=-60/7
=-8.57
hope this helps
am not sure
=f+60/7
f=-60/7
=-8.57
hope this helps
am not sure
swetha0202:
why is it divided by 7?
Answered by
1
Given median of the following data = 240.
C.I f Cumulative Frequency
0 - 100 15 15
100 - 200 17 32(17 + 15)
200 - 300 f 32 + f
300 - 400 12 44 + f(32 + 12 + f)
400 - 500 9 53 + f(44 + 9 + f)
500 - 600 5 58 + f(53 + 5 + f)
600 - 700 2 60 + f(58 + 2 + f)
---------------------------------------------------------------------------------------------
N = 60 + f.
Now,
L = 200, C.F = 32, Median class h = 200 - 300 = 100
![Median = L + \frac{ \frac{N}{2} - CF}{f} * h Median = L + \frac{ \frac{N}{2} - CF}{f} * h](https://tex.z-dn.net/?f=Median+%3D+L+%2B+++%5Cfrac%7B+%5Cfrac%7BN%7D%7B2%7D+-+CF%7D%7Bf%7D+%2A+h)
![240 = 200 + \frac{ \frac{60 + f}{2} - 32}{f} * 100 240 = 200 + \frac{ \frac{60 + f}{2} - 32}{f} * 100](https://tex.z-dn.net/?f=240+%3D+200+%2B++%5Cfrac%7B+%5Cfrac%7B60+%2B+f%7D%7B2%7D+-+32%7D%7Bf%7D+%2A+100)
![240 - 200 = \frac{60 + f - 64}{2f} * 100 240 - 200 = \frac{60 + f - 64}{2f} * 100](https://tex.z-dn.net/?f=240+-+200+%3D++%5Cfrac%7B60+%2B+f+-+64%7D%7B2f%7D+%2A+100)
![40 = \frac{f - 4}{2f} * 100 40 = \frac{f - 4}{2f} * 100](https://tex.z-dn.net/?f=40+%3D++%5Cfrac%7Bf+-+4%7D%7B2f%7D+%2A+100)
![\frac{40}{100} = \frac{f-4}{2f} \frac{40}{100} = \frac{f-4}{2f}](https://tex.z-dn.net/?f=+%5Cfrac%7B40%7D%7B100%7D+%3D++%5Cfrac%7Bf-4%7D%7B2f%7D+)
40(2f) = 100(f - 4)
80f = 100f - 400
-20f = -400
f = 20.
Therefore f = 20.
Hope this helps!
C.I f Cumulative Frequency
0 - 100 15 15
100 - 200 17 32(17 + 15)
200 - 300 f 32 + f
300 - 400 12 44 + f(32 + 12 + f)
400 - 500 9 53 + f(44 + 9 + f)
500 - 600 5 58 + f(53 + 5 + f)
600 - 700 2 60 + f(58 + 2 + f)
---------------------------------------------------------------------------------------------
N = 60 + f.
Now,
L = 200, C.F = 32, Median class h = 200 - 300 = 100
40(2f) = 100(f - 4)
80f = 100f - 400
-20f = -400
f = 20.
Therefore f = 20.
Hope this helps!
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