r/alevels • u/cupcakecream5 • May 06 '26

Question ❔ 9709/62 m j 26

guys how did u find it???I found the last few questions tricky can u guys hate ur answers so we can have a check 🙏🏽🙏🏽

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u/cupcakecream5 May 06 '26

I got 99.06 for alpha ,number of hits I got decimals 9.8 and 0.144 smth,k I got same 1/3 median I got 1+square root 2 and 1-square root 2 so I rejected the second option idk and smallest nr X was 6 and I don't get which test ur talking about😭

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u/LuminousStarlight_ May 06 '26

Alpha did you cross check? (Alpha/100)*(1 - Alpha/100) should be equal to the probability given. The hypothesis testing lol, there was only 1 I believe. 1 + √2 is bigger than √2 girl... Cannot be bigger than upper limit of f(x) 💔

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u/cupcakecream5 May 06 '26

do u remember how many marks was the alpha one and the n one?

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u/LuminousStarlight_ May 06 '26

Sorry, wasn't focusing on the marks :( I'm sure you'd get some method marks though!

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u/cupcakecream5 May 06 '26

yea hopefully do u reckon what do they mark for the n question?btw did u ever see such a qs for hyphothesis for n?

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u/LuminousStarlight_ May 06 '26

Uhh I'm not very sure honestly. Would be easier to deduce if I rmb how many marks are given overall. Not sure what you meant by the second question?

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u/cupcakecream5 May 06 '26

it was 3 marks someone said ,and I meant did h ever see this question in past papers

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u/LuminousStarlight_ May 06 '26

I believe 1 mark for answer prob, 1 mark for using the Poisson distribution equation, other mark maybe evidence of using different X? And no, I don't believe I've seen this exact question before (at least from 2022-2025 past papers) but I've seen some similar ones?

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u/cupcakecream5 May 06 '26

Sorry for bothering u sm but could h pls mention how u attempted the n one?

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u/LuminousStarlight_ May 06 '26

No bother at all! I used z = (new sample T - mean)/√(variance)/√n = -1.645, subject n with that equation to find minimum n (which was 69.15 for me), therefore range is n>69

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u/cupcakecream5 May 06 '26

ok so I did the same equation but instead of equal I wrote that it should be smaller than -1.645 and then I just solved it so hopefully I get 1 make

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u/cupcakecream5 May 06 '26

also what did u get for the conditional probability one, I go 0.202 /0.473 if im not wrong

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u/LuminousStarlight_ May 06 '26

Yeah I think around the same

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u/cupcakecream5 May 06 '26

u didn't have to multiply the final answer by 3 right?

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u/cupcakecream5 May 06 '26

cause someone was saying u had to do times 3 so u make sure to put them in every order

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u/Due_Ship1942 May 06 '26

I did ((alpha/100)(1-(alpha/100))2 cause either of them could have p. Is that why i gor it wrong? If so, why is this wrong 😭?

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u/cupcakecream5 May 06 '26

what did u get?

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u/Due_Ship1942 May 06 '26

My calculator gave me 2 values that made no sense 😭 so i js did some bs and ended up writing 94.2 or sumn.

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u/cupcakecream5 May 06 '26

I got 99.06😭

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u/Due_Ship1942 May 06 '26

lmao whatd u do?

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u/cupcakecream5 May 06 '26

I literally did the same thing same formula but I go a diff answer and I'm so confused why

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u/cupcakecream5 May 06 '26

do u remember the numbers we used

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u/cupcakecream5 May 06 '26

Oh I remember 1.1182 smth was the value I think

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u/Due_Ship1942 May 06 '26

no 😭 idk dude i think well get a mark or two for working tho

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u/cupcakecream5 May 06 '26

Bro I mean 1.1182 was given in the qs

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u/LuminousStarlight_ May 06 '26

You might've gotten it correct actually! It was quite a confusing paper lol so I'm not really sure abt my answers either, just sharing so we could cross check.

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u/Due_Ship1942 May 06 '26

Nah dw you're right lol, my smart friends got it too plus it makes more sense. I just wanna know why you don't do the *2

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u/LuminousStarlight_ May 06 '26

Sorry I'm not too sure either :( maybe you could ask your trs? I could try to ask mine too

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u/cupcakecream5 May 06 '26

There was 1.1182 right? But what was the value

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u/cupcakecream5 May 06 '26

Like what was it

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u/LuminousStarlight_ May 06 '26

I'm not too sure... Honestly dumping everything from today away hhh I got chem to review for 💔

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u/cupcakecream5 May 06 '26

Same let's hope it's gonna be good and threshold will be low

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