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Official Edexcel S3 thread Wednesday 20 May 2015 Morning [6691]

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Reply 620

username1259045

Original post by Xin Xang

All of the marks I assume as that is completely wrong.

if you get 1 freq wrong is that like 2 accuarcy marks? one for expected freq and one for the statistic?

Reply 621

STATER

Original post by Xin Xang

I was just guessing from the information given. I assume that the hypothesis involved something about discrete uniform, which would be wrong.

Depends if he used the word 'discrete' or said U[0.10] is a good model. Now that I think about it, you're probably right.

Reply 622

Amandeep_3

Do you think id get any marks in 1a for saying us systematic sampling and I mentioned random numbers ?

Reply 623

plainsoveralls

does that get me all the marks for 5b?

Reply 624

Gome44

Original post by Kelani

does that get me all the marks for 5b?

Yes

Reply 625

Gome44

Original post by Amandeep_3

Do you think id get any marks in 1a for saying us systematic sampling and I mentioned random numbers ?

Probably 1 for random numbers

Reply 626

plainsoveralls

How many marks would stating the hypotheses and significance level get me in 4a?

Reply 627

Gome44

Original post by Kelani

How many marks would stating the hypotheses and significance level get me in 4a?

2/3. But surely you would have made a conclusion if you did this?

Reply 628

Xin Xang

Original post by Kelani

How many marks would stating the hypotheses and significance level get me in 4a?

2. It only makes sense since the hypotheses and the significance level would each be 1 mark.

Reply 629

Bayestheorem

can someone please post 6a solution????

Also how many marks for 5d arriving at 0.181 again as quite a few people did it, 0? eg for (their value......) in mark scheme?

Reply 630

plainsoveralls

Original post by Gome44

2/3. But surely you would have made a conclusion if you did this?

Wasn't sure what to do from there. Never seen a question like that. Can you explain?

Reply 631

rosie10

Yes 6a solution please...

Reply 632

Mutleybm1996

Original post by Xin Xang

All of the marks I assume as that is completely wrong.

My teacher said I'd lose about 3-4 maximum
The HOD agreed, yes, I was a bit panicked so went round asking everyone !

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(edited 8 years ago)

Reply 633

oopsiamsobusted

I'm just waiting for a Hitler video coming out... Is it true that 90ums=top 10% of students or is there some conspiracy with the ums as well..?

Reply 634

JuliM

Original post by Mutleybm1996

My teacher said I'd lose about 3-4 maximum
The HOD agreed, yes, I was a bit panicked so went round asking everyone !

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I made the same mistake as you and assumed it was discrete uniform distribution, I don't see how you would still gain any marks though (based on previous mark schemes w/ notes). absolute bummer.

Reply 635

Mutleybm1996

Original post by mmms95

if you get 1 freq wrong is that like 2 accuarcy marks? one for expected freq and one for the statistic?

There'd be a follow through
Like with mine I'd lose an accuracy mark for the answer and one or two for the frequencies but the rest will all be okay because I calculated the values correctly with the hypothesis and conclusions based on the values correct

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Reply 636

Mutleybm1996

Original post by JuliM

I made the same mistake as you and assumed it was discrete uniform distribution, I don't see how you would still gain any marks though (based on previous mark schemes w/ notes). absolute bummer.

Well that's what they said?
I'm sure we'd get a few marks regardless, we'd only lose a few

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Reply 637

infinity5

Original post by phgeorgiou

worst S3 exam made up of 6 exercise what the ... ex5 and 6 were so bull**** in my school out of the 40 students taking the exam not even one was okay with it