Maths problem

[abcde]

AOA!
Please help me with this. Check out question 4 of this paper: http://www.xtremepapers.me/CIE/Cambridg ... 3_qp_2.pdf

For part (b), I think the modal class should be 40<v<50 but the er http://www.xtremepapers.me/CIE/Cambridg ... w03_er.pdf gives it as 50<v<55. Why???? :? :?

 

[Firebender]

The links are broken, this is the working link:http://www.xtremepapers.me/CIE/Cambridge O Levels/4024 - Mathematics/4024_w03_er.pdf and http://www.xtremepapers.me/CIE/Cambridge O Levels/4024 - Mathematics/4024_w03_qp_2.pdf

This is a question of frequency density. basically, freq/class width(i.e for 40<v<50 class width it will be 50-40=10) for each class will give you a range of values for which you have to draw a bar graph. Whenever class widths are NOT uniform, we use freq. density.

The highest bar will be your modal class.

1) 40<v<50 has freq=14
2) 50<v<55 has freq=10

FREQUENCY DENSITY=

1) 14/10 = 1.4
2) 10/5 = 2

Thus, 2 is the answer. you would still need to check freq. density of all the classes to say for sure this is the highest.

 

[SalmanPakRocks]

yeah links are broken and firebender has got the right answer !!

 

[CaptainDanger]

I was going to answer that, thanks Firebender for making my work easy...

 

[SalmanPakRocks]

hehehehehehehehe yeah !!

 

[Firebender]

Happy to help!

 

[CaptainDanger]

 

[abcde]

Thank you!

 

[CaptainDanger]