Maths, Addmaths and Statistics: Post your doubts here!

[funky brat]

41? You sure it was 41 right? Not 40?

Estimate, they said.
It was 40.5 so either way it's correct.

 

[funky brat]

normal frequency histogram right?

I made that, people made that frequency density thing, what's correct?

 

[Abdul Hanan]

graph was of frequency !!!

 

[funky brat]

Frequency density ofcourse. There were irregular intervals


Something tells me you are a dean ambrose fan

Did you see the past papers where there were unequal intervals and frequeny was potted not f.d.

 

[Abdul Hanan]

maybe i think it said "show this information of table in a histogram"
i think both frequency and frequency density would be right

 

[Abdul Hanan]

Density.

What was the answer to the vector question last part. Ratio of area of Triangle and Trapezium?

1:15 area
and 1:4 perimeter

 

[funky brat]

What was the answer to vector CD?

 

[Awesome12]

I made that, people made that frequency density thing, what's correct?

graph was of frequency !!!

It can't be of frequency as there were irrgular intervals. So we had to make a f.d graph
Plus what were the rounded off values of the second part of the 2nd question In section B

the value was 148.46 (This is not the exact value)
This rounded off to 3 s.f is 149?

 

[FLRNAB]

How Awesome12 thought we will react:

How we actually reacted:

How he reacted:

 

[Abdul Hanan]

It can't be of frequency as there were irrgular intervals. So we had to make a f.d graph
Plus what were the rounded off values of the second part of the 2nd question In section B

the value was 148.46 (This is not the exact value)
This rounded off to 3 s.f is 149?

any example in past paper ?

 

[M.Omar]

Did you see the past papers where there were unequal intervals and frequeny was potted not f.d.

Nope we had to draw frq density check in mj 2013 P21 ER and u will find out

 

[Awesome12]

any example in past paper ?

I have given Statistics. It was there
Look at this
http://www.xtremepapers.com/revision/gcse/statistics/histograms.php

 

[funky brat]

Wasn't perimeter 1:5?

Coz it was a:5a.

1:5.

Mine was 1:5 too but everybody's like it's 1:4.

 

[M.Omar]

Wasn't perimeter 1:5?

Coz it was a:5a.

1:5.

1:4 it was pretty clear actually
and ratio for trapezium =1/15 right?

 

[Abdul Hanan]

Wasn't perimeter 1:5?

Coz it was a:5a.

1:5.

i am 100% sure on the perimeter and area one
perimeter was 1:4 as one triangle's side was 1a and other's 3+1 so 4a (im not telling b here)
so 1:4

 

[FLRNAB]

1:15 area
and 1:4 perimeter

Area of Triangle if you take b as base then AC was height.
Area of Trapezium is h(a+b)/2

I got 1:4 first then 1:9 then 1:25.
I guess I wrote 1:25

 

[M.Omar]

any example in past paper ?

MJ 2013 P21 read the ER for clarification

 

[Abdul Hanan]

1:4 it was pretty clear actually
and ratio for trapezium =1/15 right?

yea area 1:15
and perimeter 1:4

 

[Dark Destination]

I made that, people made that frequency density thing, what's correct?

Wrong. Frequency Density only.

1:4.

No, 1:15

Wasn't perimeter 1:5?

Coz it was a:5a.

1:5.

Wrong. 1:4

 

[Ram97]

What was vector CD??
What was the height in Mensuration qs.??