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# Edexcel S4 - Friday 24th June 2016 AM

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1. (Original post by Trystalos)
Do you reckon we could pick up maybe 4/9 marks for Q7 if we calculated the mean C.I? We would've had to find s/root(n) at least - up until there it would've been correct. I mean that would be marks for subtracting the mean and dividing by the correct t-critical values. Sneaky buggers.
(Original post by electrifeye)
I would have thought that maybe 4-5 of the marks would be for finding the mean & s.d, that's half the solution after all. So we could still get A* if we made no other mistakes, not sure if I did or not.
I suspect we'd get 4/9. Which is annoying because now we're capped at 70/75...
2. (Original post by TLDM)
A couple of people have had 0.68 stored in their calculator - what was this for? I recognise most/all of the other numbers but not that one.
Finding that value in the table for test A I think.
3. Okay but did anyone else not reject the null hypothesis for like all of the tests except one? Actually I can't even remember if I had one where I did reject it.
4. (Original post by gagafacea1)
Okay but did anyone else not reject the null hypothesis for like all of the tests except one? Actually I can't even remember if I had one where I did reject it.
Yeah I think only one or two were significant. For most you accepted the null hypothesis.
5. (Original post by SB0073)
Finding that value in the table for test A I think.
Oh, that would be it. I gave my answer to 4dp (a habit I've got into with a lot of S1-3 tables using 4dp) - do you think I'll lose marks for the extra accuracy? Did the question ask for 2dp, like the other values in the table?
6. (Original post by Euclidean)
How was STEP III fam?

I got you on Facebook now I think

Posted from TSR Mobile
Lol just seen this haha.
Really? Have you added me though?

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7. (Original post by physicsmaths)
Lol just seen this haha.
Really? Have you added me though?

Posted from TSR Mobile
Yeah PM'd you
8. Now that the papers out: http://www.thestudentroom.co.uk/show...2#post66502982 Post 1315. Does anyone have realistic grade boundary predictions and is anyone up for making and unofficial mark scheme as there is none for stats papers...

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