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Mathematics: Post your doubts here!

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hey guys,
I have a doubt regarding the marking system of the maths exams. Is there error carried forward (e.c.f) in the sub-questions?
 
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ZaqZainab

Zaqy ye wali ;)
 
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can u pls help me in this question 9709/61/o/n/10 question 3 (ii) what does it mean 1.654 standard deviations above the mean? pls explainmarks scheme http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w10_ms_61.pdf question paper
http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w10_qp_61.pdf
they said more than 1.645 sd above the mean which means 1.645*standard deviation and then above the mean means =26.4+(1.645*3.7)-26.4/3.7 =phi(1.645)
which gives 0.95 and because they said more than u do 1-0.95=0.05
i hope u understood this is a bit complicated ik ,if i did something wrong u ppl r free to correct me :D
 
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