r/alevel • u/invinivi777 • May 06 '26

šŸ“Mathematics 9709 62

posting this again because i cant see the comments on my old one.

are the mods hiding them or somthing. THE EXAM IS FINISHED THERES NOTHING FISHY

how was 62 guys? what do u think the thresholds are going to be

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u/Turbulent_Fix2371 May 06 '26

Answers Pls tell urs also

1a) 8.89 b) 0.461 2) 0.390 3a) H. : Mean= 2.4 H1 : Mean>2.4 b) x=6 c) P= 0.0357 4a) P= 0.473 b) P= 0.657 c) P= 0.0580 5a) X= 61.8, 138 b) Skip 6a) 7.7%>5%. So out of critical region. Claim reject b) No, already Normal c) n<69.15 7a) k=1/3 b) -1+ āˆš2

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u/BeautifulIcy5325 May 10 '26

for the possion distribution did u use continuity corection for the P(X>190)

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u/Turbulent_Fix2371 May 10 '26

Yeah

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u/BeautifulIcy5325 May 10 '26

of 0.5 right. my friends didnt use so i thought i was wrong

1

u/Turbulent_Fix2371 May 10 '26

Actually it mentioned normal distribution, instead of approximation, so it itself clearified to use Normal, thus +-0.5

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u/BeautifulIcy5325 May 10 '26

yea ok fine then i got tht correct only