S2 Edexcel Thursday 24th May AM - PAPER & SOLUTIONS IN FIRST POST

Just go through the posts every single question has been asked and answered


This was posted from The Student Room's iPhone/iPad App

The mark schemes are now out. As I expected, using Poisson on the last question gets no marks.

Hi can u upload the maths papers please

They are on the Edexcel website

They are on the Edexcel website

Can anyone upload the June 2012 mark schemes?

They will be secure download on Edexcel website, so can't get them.

This:

I have uploaded them here.

can somebody explain to me question 2) b)

You're just calculating the probability of your critical values and adding them together!

but isn't the question asking the incorrect probability of rejecting Ho???

Here are the solutions. Thanks for all the negative rep! I know Arsey is an insomniac but some of us need our beauty sleep!

It comes in two parts unfortunately (I just couldn't get it to less than 1MB).

I thought it was pretty easy with a couple of unusual questions so my best guess for grade boundaries is about 63 for an A.

Let me know what you think.

EDIT the value associated with the crit region in Q2 should be 0.0216 not 0.0215 (doing it in my head!)

People are questioning whether you should use Binomial or Poisson in the last question. Due to the values of n and p mean is not equal to variance and so a Poisson distribution will not give very accurate answers. I am sure that you will gain method marks for this question by using Poisson but the fact is that you may lose a number of accuracy marks.