IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => GCE AS & A2 Level => Math => Topic started by: candy on May 26, 2009, 01:20:55 pm

Title: Math paper 6 statistics..histogram help needed!
Post by: candy on May 26, 2009, 01:20:55 pm

i made the frequency density chart...but i don't know how to sketch it!
because wen i do...the line 0.05 touches the 0 line...and 0.55 touches the 0.5...........3.05 touches the 3 and so on!!  :( :(

please help me! how should i sketch it?? what size should i take for my axis??

Title: Re: Math paper 6 statistics..histogram help needed!
Post by: master786 on May 26, 2009, 01:27:38 pm

O candy ...
u just start the axis from 0... this date is assumed to be continuous ...
so if the bars touch each other .... they take the lower boundary into consideration..
so as u said it toucehs each other.... thts perfectly alright

Title: Re: Math paper 6 statistics..histogram help needed!
Post by: candy on May 26, 2009, 01:45:01 pm

how can i start from 0 when my FIRST  lower boundary is 0.05 ...so that means i need to start my graph from 0.05...but when i try to start from 0.05 it touches the 0 line....so how much should should i take my axis as?
because in the markscheme they have haven't started from 0..there is a gap b/w the chart and 0

this question is from may june 2008 question 5
 :(

Title: Re: Math paper 6 statistics..histogram help needed!
Post by: master786 on May 26, 2009, 01:49:11 pm

yea i mean 0 wud be the beginning but hmm lik how shud i xplain :P

usually graphs hav 10 small blocks which makeup a one big lbock:P
so eacho f ur one bl0ck is 0.1 so u beign with 0.1

so urscale on the graph is 1cm=10 units

Title: Re: Math paper 6 statistics..histogram help needed!
Post by: candy on May 26, 2009, 01:59:39 pm

hahahaha
ok i get it now master  8)
Thanx a lot!  :)

Title: Re: Math paper 6 statistics..histogram help needed!
Post by: master786 on May 26, 2009, 02:11:01 pm

no worries :D