Qualification > Math

IGCSE MATHS Doubts

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Vin:

like this one .. =|

Shazizzzle:

--- Quote from: ~VIN1094~ on May 11, 2010, 07:45:58 pm ---I hate HISTOGRAMS .. !!  somebody any tip for solving them ?? u wan me to post a paper ?? pls anything.. :)

--- End quote ---

f.d = k X f/c.w

K, the constant.
When, both frequency AND histogram i.e frequency density for one group are given, use them to find K.
Sometimes, the f.d may not be equal to f/c.w.
Once you have, use the formula to either find
1. f.d of groups with F already given, and use it to make the bar...
OR
2. Use the f.d on the histogram given to find th F and record in table. :)

Ghost Of Highbury:
w09, paper 4, 2)iv

ok this negative shear factor thingy is horrible..i cant figure it out y the move upwards is considered negative.

anyhow, its always wiser to use the matrix method

take two object and correspoding image co-ordinates..

(-4,1) --> (-4,5)

(-1,1) --> (-1,2)

check the image attached

a shear transformation matrix with y-axis is invariant is = (1  0)
                                                                            (k   1)

here k = -1

Adzel:

--- Quote from: Shazizzzle on May 11, 2010, 07:50:44 pm ---f.d = k X f/c.w

K, the constant.
When, both frequency AND histogram i.e frequency density for one group are given, use them to find K.
Sometimes, the f.d may not be equal to f/c.w.
Once you have, use the formula to either find
1. f.d of groups with F already given, and use it to make the bar...
OR
2. Use the f.d on the histogram given to find th F and record in table. :)

--- End quote ---

Can you explain more; like what is k and c.w ???

ksitna:
loll hey baladya
i just realised we usually have the same number of posts :)

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