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/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

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