Qualification > Math

nov 08 paper.urgent!

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Ascer Zayan:

--- Quote from: vids on May 17, 2009, 08:13:28 am ---pls can any1 explain me histograms?
nd d q 6 (b)ii. of nov 08 p4

--- End quote ---
to Draw to histogram first find the F.d (Frequency density = Frequncy divided by class width)
then Plot F.d on the y axis and intervals on x-axis
for Nov2008
Find the F.d for 20<m<22 which equals to 57.5 and find all F.d for the rest (for first one it is 3.5,then57.5,then12.5 then 4)
then  use ratio
57.5-11.5
3.5-X
cross multiply X=0.7
then repeat with others  with ratios
AND VOLA

2009scared:
Thanks a lot!

I Jimmy I:
Ok listen,
For 20< x < 22 it says that the height is 11.5 which can be done by dividing 115 by 2, and then by 5
Cuz for these type of questions u need to divide the frequency by the range and then divide or multiply or add or subtract to get a similar answer to the given one...
This questions is quite easy however I still have a  doubt in finding the possible values of the median but the rest is fine...

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