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# S1 Weird question help

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1. I know this is usually against forum rules but its the day before the exam and I'm really struggling with this question (and Arseys solution makes no sense to me) so can someone please please post a full solution with an explanation to question 5B and 5C of the June 2014 (R) paper? I have posted a link to the paper.

For 5B, the f=ak method yields the wrong answer for some reason? Same with 5C.

https://1a388b28f5ce9318f837a64962fc...%20Edexcel.pdf

Zacken SeanFM or anyone else that can help please.

2. (Original post by TheRandomGenius)
I know this is usually against forum rules but its the day before the exam and I'm really struggling with this question (and Arseys solution makes no sense to me) so can someone please please post a full solution with an explanation to question 5B and 5C of the June 2014 (R) paper? I have posted a link to the paper.

For 5B, the f=ak method yields the wrong answer for some reason? Same with 5C.

https://1a388b28f5ce9318f837a64962fc...%20Edexcel.pdf

Zacken SeanFM or anyone else that can help please.

You can calculate frequency density for each bar (ignore the 'k') then compare the highest FD to 6cm height. Just be careful with bar widths - the first bar is 3 wide.

For c, check out the thread on S1 in the maths exams bit of the site (recent pages)
3. (Original post by TheRandomGenius)
I know this is usually against forum rules but its the day before the exam and I'm really struggling with this question (and Arseys solution makes no sense to me) so can someone please please post a full solution with an explanation to question 5B and 5C of the June 2014 (R) paper? I have posted a link to the paper.

For 5B, the f=ak method yields the wrong answer for some reason? Same with 5C.

https://1a388b28f5ce9318f837a64962fc...%20Edexcel.pdf

Zacken SeanFM or anyone else that can help please.

The height of a histogram is represented by the frequency density, so you need to calculate the frequency densities, and then use the f=ak method, if that means what I think it does.

For c, I would just assume that the frequency is evenly spread out between the times. (Eg is a class went from 1.5 to 3.5 and there were 20 of them, then I would estimate that half of them are between 1.5 and 2.5 and the other half from 2.5 to 3.5, or that 3/4 of them go from 1.5 to 3.0 and the other 1/4 go from 3.0 to 3.5.

A way to picture it is just the % of the area that you have in a region, the same % of the frequency can be attributed to that area.
4. Thanks to both of you, understand it now.

How about 7d on the same paper? Again, struggling to understand Arseys solution (which is very rare).
5. (Original post by TheRandomGenius)
Thanks to both of you, understand it now.

How about 7d on the same paper? Again, struggling to understand Arseys solution (which is very rare).

I hope it's not to messy, the histogram is a bit messy, ignore the bit I crossed out

Attachment 550279550281
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