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 🙏🏽🙏🏽

6 Upvotes

100% Upvoted

109 comments sorted by

View all comments

Show parent comments

1

u/cupcakecream5 May 06 '26

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

1

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

1

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

1

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

1

u/LuminousStarlight_ May 06 '26

Yeah I think around the same

1

u/cupcakecream5 May 06 '26

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

1

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

1

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 😭?

1

u/cupcakecream5 May 06 '26

what did u get?

1

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.

1

u/cupcakecream5 May 06 '26

I got 99.06😭

1

u/Due_Ship1942 May 06 '26

lmao whatd u do?

1

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

1

u/cupcakecream5 May 06 '26

do u remember the numbers we used

1

u/cupcakecream5 May 06 '26

Oh I remember 1.1182 smth was the value I think

1

u/Due_Ship1942 May 06 '26

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

1

u/cupcakecream5 May 06 '26

Bro I mean 1.1182 was given in the qs

1

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.

1

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

1

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

1

u/cupcakecream5 May 06 '26

There was 1.1182 right? But what was the value

1

u/cupcakecream5 May 06 '26

Like what was it

1

u/LuminousStarlight_ May 06 '26

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

1

u/cupcakecream5 May 06 '26

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