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Edexcel (IAL): Statistics 1, WST01 (27th January 2016)

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Original post by physicsmaths
I think you swithced the possibility. Exactly two get a merit.


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Exactly two get a merit, so 0.25 * 0.25, I've got that. So the next candidate needs to get a *pass*. That is, he needs to be in the top 75%, but he can't be in the top 25% because that's a merit. So he has to be in the middle 50%. Does that make any sense?
Anyone remembers exact question b? or any values I only remember P(X>28) the other was around 50~ something
Original post by Zacken
Exactly two get a merit, so 0.25 * 0.25, I've got that. So the next candidate needs to get a *pass*. That is, he needs to be in the top 75%, but he can't be in the top 25% because that's a merit. So he has to be in the middle 50%. Does that make any sense?


Ah I get you. Well done I didn't spot that, you have got it right!


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Original post by Hamzah249
Anyone remembers exact question b? or any values I only remember P(X>28) the other was around 50~ something


28 and 50.
Original post by physicsmaths
Ah I get you. Well done I didn't spot that, you have got it right!


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You gave me a scare there, phew! :tongue:
Original post by Zacken
You gave me a scare there, phew! :tongue:


:wink: I will get back to my BMO2 paper 🌝😂


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Original post by Zacken
28 and 50.


:h:

And do you remember mean & sd?
Original post by physicsmaths
:wink: I will get back to my BMO2 paper 🌝😂


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And I to M2. Good luck for tomorrow! What are you aiming for?
Original post by Zacken
And I to M2. Good luck for tomorrow! What are you aiming for?


Bottom of leaderboard/Distinction
(top 30-35 ish) So i need around 1-205/40 which will put me in top 35 ish.


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Original post by Hamzah249
:h:

And do you remember mean & sd?


Mean and SD? It's in my post, isn't it?
Original post by physicsmaths
Bottom of leaderboard/Distinction
(top 30-35 ish) So i need around 1-205/40 which will put me in top 35 ish.


Damn son you better get that otherwise you're a wasteman, hopefully lots of geometry.
Original post by Zacken
Mean and SD? It's in my post, isn't it?


Yeah that's the one for part c with 2 equations im asking the one from a and b if you remember which were given to us
Original post by Zacken
Damn son you better get that otherwise you're a wasteman, hopefully lots of geometry.


Always 1 geometry no less no more. Only 4 question remember.
Geometry Combinatorics Number theory and one weird one(algebra function inequalities).


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Original post by Zacken
Damn son you better get that otherwise you're a wasteman, hopefully lots of geometry.


True dat. U better 100ums M2 otherwise u da wasteman


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Original post by Hamzah249
Yeah that's the one for part c with 2 equations im asking the one from a and b if you remember which were given to us


Ohhh, mean was 22 and standard deviation was... 10.
Original post by physicsmaths
Always 1 geometry no less no more. Only 4 question remember.
Geometry Combinatorics Number theory and one weird one(algebra function inequalities).


no excuses wreck it fam

Original post by physicsmaths
True dat. U better 100ums M2 otherwise u da wasteman


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but moments m8
Original post by Zacken
no excuses wreck it fam



but moments m8


Lol moments, just perp distance and ur done. Don't resolve he force resolve he distance n ur done.
Energy formula
Tot enrgy b4+wd=enrgy after +wd by fric forces
That got me 100ums tbh. Literally. My paper was trivial though 2014 M2.


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Original post by physicsmaths
Lol moments, just perp distance and ur done. Don't resolve he force resolve he distance n ur done.
Energy formula
Tot enrgy b4+wd=enrgy after +wd by fric forces
That got me 100ums tbh. Literally. My paper was trivial though 2014 M2.


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Still full raw - quite an achievement!
Original post by aymanzayedmannan
Still full raw - quite an achievement!


Na full raw in M1 was my achievement that year since it was like 70 for 100.


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Original post by Zacken
Disclaimer: If you disagree with any of my answers, I'm probably wrong and you're probably right

6(a) mean = 836, standard dev = 79.9
(b) postiive skew, mean > median.
(c) no change
(d) standard dev decrease.


For 6d), I don't understand how S.D decrease while there was no change in the mean value. I must be missing something...

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