Edexcel S2 - 27th June 2016 AM

If you just stick with X (rather than involving Y) it's just finding the least value of n for which that has been satisfied. Similar to finding the value for a critical region but it has to be the first value that is greater than 0.9.

in the book it says that we "should be able to derive it from first principles" so i guess it could come up. That would be the only derivative we have to know right?

Yup my last one...finally. The worst feeling is getting your exam timetable and realizing just how much cramming and mental pain there is going to be for the next few weeks. LOL easier. Too bad A levels are getting even harder, with the new syllabus and all. I feel sorry for the younger kids.



Either geniuses or not putting in any real work

I thought it wasnt many exams, but the fact that its spread out over a whole month is kinda annoying, but better than intense cramming. And yh, i saw the spec of the new chemistry, and boy was i glad to be born one year earlier before them.

This is what I did so far:


But how do you know it's not the first function but it's the second one?

Help please


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I believe you would say that because F(a)=0.892, the max the first function can go is 0.6 which is when x=4. as F(a) is greater than 0.6, you would use the 2nd function. hope this helps

Probably a dumb question but your not expected to approximate a Poisson with binomial right? Also does it matter when doing a hypothesis test with a normal distribution whether you work out the probabilities or just use the Z values? Thanks

Did anyone else find the JUNE 14 R paper hard?

which s2 paper is the hardest? I..e has the lowest grade boundaries

How do you know the area of a triangle is 0.5 in this question?
For part C



Mark scheme




Posted from TSR Mobile

Even all my teachers seem mad at the new spec. At least it gives some of the lazy teens a kick up the ass