Qualification > Math

nov 08 paper.urgent!

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vids:
pls can any1 explain me histograms?
nd d q 6 (b)ii. of nov 08 p4

I Jimmy I:
Attach the paper?
So that I'll explain to u

vids:
here u go

vids:
n hw do u go abt histograms...
d formaula which is fd=f/range
d ans is nt cuming right 4 d nov 08 q ???

Priceless:
LOL ya sure np. hwevr wat du u wanna bout histograms. dey r just like bar charts but only der bars touch. u draw dem wen u hv continuous groups of data like in da ques in O/N 08 ppr Q6. however dey told not 2 draw a histogram so 2 work dat out. du this.
in this case u hv 2 work out da frequency density which u find out boy doing FD= Frequency/Group width. usually FD is equal 2 da height of da column so 11.5=115/(2x) itz 2x becuz if u c da width of da column 20-22 is 2 n since 115/2 duz not equal 11.5 der has 2 be sum constatnt. so u can work out da constant now. 2x=115/11.5=10 so x=10/2=5. so now u can find out da heights=FD of da other columns now. FD=frequency/width x 2. so 4 10<m<20 u wud 2 FD=35/(10x5)=0.7 n if u check in da mark scheme itz da rite answer. u can work out da heights like this 4 da other columns aswell.

Hope i helped n i hope u understud- itz a bit hard 2 explain. neway best of luck wid ur xams! :)

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