IGCSE/GCSE/O & A Level/IB/University Student Forum
Qualification => Subject Doubts => IGCSE/ GCSE => Math => Topic started by: Most UniQue™ on May 14, 2011, 07:43:05 am
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O/n 2008 q 6b (ii)
Pls help got exam on Monday plzzz help!!
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O/n 2008 q 6b (ii)
Pls help got exam on Monday plzzz help!!
which paper and which board(as, a or Igcse)?
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which paper and which board(as, a or Igcse)?
Oops sry p42 igcse
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O/n 2008 q 6b (ii)
Pls help got exam on Monday plzzz help!!
find the standard width...the height given = 11.5, its frequency is 115
therefore 11.5 = 115/n...=> n = 10
class width = 10 * standard width
2 = 10 * standard width
therefore standard width = 0.2
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now use this formula with standard width 0.2 to calculate the heights..
height = fequency * (standard width/classwidth)
1st - h = 35 * 0.2/10 = 0.7
2nd - 11.5 (given)
3rd - h = 26 * 0.2/2 = 2.6
4th - h = 24 * 0.2/6 = 0.8
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find the standard width...the height given = 11.5, its frequency is 115
therefore 11.5 = 115/n...=> n = 10
class width = 10 * standard width
2 = 10 * standard width
therefore standard width = 0.2
-----------------------------------------------------
now use this formula with standard width 0.2 to calculate the heights..
height = fequency * (standard width/classwidth)
1st - h = 35 * 0.2/10 = 0.7
2nd - 11.5 (given)
3rd - h = 26 * 0.2/2 = 2.6
4th - h = 24 * 0.2/6 = 0.8
Where did u get 2 frm ?
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Plz answer its very important got exam on monday! plz i really appreciate it!
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Plz answer its very important got exam on monday! plz i really appreciate it!
Dude come on msn -.-
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Dude come on msn -.-
cn u scan it to me, i wont be able!
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Where did u get 2 frm ?
read the question again. the class width is 2 for 20-22
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read the question again. the class width is 2 for 20-22
I dnt c any 2! and wt do u mean by class width??
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I dnt c any 2! and wt do u mean by class width??
its the numbers in between... For example: 20<x<=30 class width is 10
23<x<=29 class width is 6
Length in a histogram is found by this formula:
Frequency density= Frequency/ class width
so
as you will see that 11.5 is found by 115/2 x 5
now do the same process including that >>>> x 5
you will receive the answer ^_^
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its the numbers in between... For example: 20<x<=30 class width is 10
23<x<=29 class width is 6
Length in a histogram is found by this formula:
Frequency density= Frequency/ class width
so
as you will see that 11.5 is found by 115/2 x 5
now do the same process including that >>>> x 5
you will receive the answer ^_^
i got everything exce[t x 5? why x 5?
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Again, read the question
"On a histogram, the height of the column for the 20<m<=22 interval is 11.5 cm."
The class is - 20<m<=22
The class width = 2
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Again, read the question
"On a histogram, the height of the column for the 20<m<=22 interval is 11.5 cm."
The class is - 20<m<=22
The class width = 2
hmm got it Thanks a lot n saud Thanks a lot and plz answer the question which i asked... Thanks
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oh saud i got it, u mean if v multiply 2 by 5=10 and 115 divided by 100, its 11.5 so dats y v use 5 , right?
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i got everything exce[t x 5? why x 5?
we have different class widths of diff sets of values :)
So the 11.5 is done by multiplying it with 5, to make it a common.. .
got it?
to make something in common in class width they multiplied it with 5
otherwise it should have been 115/2 = 57.5 cm
to make common in class width :)
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we have different class widths of diff sets of values :)
So the 11.5 is done by multiplying it with 5, to make it a common.. .
got it?
to make something in common in class width they multiplied it with 5
otherwise it should have been 115/2 = 57.5 cm
to make common in class width :)
No :( u mean in order to make it 11.5 u multiply it by 5?
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No :( u mean in order to make it 11.5 u multiply it by 5?
DUde.
To find the length for 115 frequency thing,
Length is found by frequency density formula... so f.d. = frquency/class width
115/2 = 57.5 but they said it is 11.5
if we do like this 115/2 x 5 that will give 11.5
so they multiplied it with 5
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DUde.
To find the length for 115 frequency thing,
Length is found by frequency density formula... so f.d. = frquency/class width
115/2 = 57.5 but they said it is 11.5
if we do like this 115/2 x 5 that will give 11.5
so they multiplied it with 5
Yah I already got it Thanks