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# Edexcel S4 - Friday 24th June 2016 AM

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1. I actually had a thought - How do you we do power and size tests with a normal distribution? Have a feeling this is gonna screw me tomorrow
2. (Original post by tazza ma razza)
I actually had a thought - How do you we do power and size tests with a normal distribution? Have a feeling this is gonna screw me tomorrow
You'd do it in terms of the phi (cumulative distribution) function for the normal distribution. With quite a few inequalities

I doubt they'd expect it
3. (Original post by Euclidean)
You'd do it in terms of the phi (cumulative distribution) function for the normal distribution. With quite a few inequalities

I doubt they'd expect it
OK - would you use the percentage points for the critical region? Or like the method used in S2?
4. (Original post by tazza ma razza)
OK - would you use the percentage points for the critical region? Or like the method used in S2?
Percentage points (or whatever the second 'nice' table is called! )
5. (Original post by tazza ma razza)
apart from june 11, what is a hard paper?

I think grade boundaries will be:

100 - 75
90 - 69
80 - 64
June 2013 R maybe 2015?
6. (Original post by 130398)
June 2013 R maybe 2015?
cool just did 2015 - got 65 (got the last 8 marks wrong and then made another 2 marks of rounding errors)

Boundary wise tho, seems about right doesn't it?
7. (Original post by tazza ma razza)
I actually had a thought - How do you we do power and size tests with a normal distribution? Have a feeling this is gonna screw me tomorrow
Question 7 of June 2013 R uses type II error with normal. I'm currently looking through the mark scheme trying to work out what the heck is going on.
8. (Original post by electrifeye)
Question 7 of June 2013 R uses type II error with normal. I'm currently looking through the mark scheme trying to work out what the heck is going on.
awesome - i will do that paper after the current one im doing
9. can someone link the june 13r paper? I can't open the pdf from the website!
10. The F tables have values for v_1 and v_2 at infinity, do we use these if our v values are very large?

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11. (Original post by tazza ma razza)
can someone link the june 13r paper? I can't open the pdf from the website!
Find all the papers here: http://www.physicsandmathstutor.com/...rs/s4-edexcel/

(Original post by Euclidean)
The F tables have values for v_1 and v_2 at infinity, do we use these if our v values are very large?
I think that's what they're for, not sure why else they'd be there
12. providing they dont ask an aids qn on ch1 like a batty intergration with a pdf i think we are good.

Hoping for minimum 75%
13. (Original post by tazza ma razza)
providing they dont ask an aids qn on ch1 like a batty intergration with a pdf i think we are good.

Hoping for minimum 75%
I agree, that's pretty much the only tricky part to a paper.
14. (Original post by tazza ma razza)
providing they dont ask an aids qn on ch1 like a batty intergration with a pdf i think we are good.

Hoping for minimum 75%
That cracked me up 😂😂

In all seriousness though every paper is the same pretty much they never ask anything new. I'm hoping I can get 90% and bring up my FP2

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15. (Original post by ragreener1)
That cracked me up 😂😂

In all seriousness though every paper is the same pretty much they never ask anything new. I'm hoping I can get 90% and bring up my FP2

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power and size etc is a breeze - so is estimating etc however the 7 marks where it all comes from the pdf is gonna tear me a new one i can just tell looool

C4 as well first is just gonna piss on the parade as well
16. (Original post by tazza ma razza)
power and size etc is a breeze - so is estimating etc however the 7 marks where it all comes from the pdf is gonna tear me a new one i can just tell looool

C4 as well first is just gonna piss on the parade as well
Yeah that's true, in isolation on my own for three hours inbetween
17. (Original post by ragreener1)
Yeah that's true, in isolation on my own for three hours inbetween
yuo must be doing ial? i have c4 at 9 and then s4 at 10:45
18. (Original post by tazza ma razza)
yuo must be doing ial? i have c4 at 9 and then s4 at 10:45
Nope s4 isn't on IAL. I've got C4 at 9:30 then as my sixth form will only do two exam sessions I have to wait supervised by an invigilator until 2pm when I've got S4

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19. (Original post by ragreener1)
Nope s4 isn't on IAL. I've got C4 at 9:30 then as my sixth form will only do two exam sessions I have to wait supervised by an invigilator until 2pm when I've got S4

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LOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOL sorry to hear that man aha
20. How did pple find it?
Q1 was so long. What was your guys test statistic?
Q2 was your test statistic 1.511?
There was at algebra this which was lovely
I had n>1 iff n^2+2n>3n giving the best estimator.

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