OCR MEI - S1 - 20th May 2015

How many marks were the last two parts of the paper?

Reply 301

iamJOM

Original post by Spelly456

For the mean and standard deviation on Q1 it said find x. Does that mean you wouldn't have to put units (£) on the answers?

In most mark schemes they seem to just ignore units, so it shouldn't really matter if you did or didn't put them on.

Reply 302

JamesExtra

Original post by YA BISH

i think i messed up hypotehis one...
i did h0: u=15.6
h1 u>15.6
then used what i had for the value of 19 showed it was greater than 0.01 and concluded...
do you think i will get any marks for this

Are you serious? You've lost 8 marks if you've done that

Reply 303

YA BISH

Original post by JamesExtra

Are you serious? You've lost 8 marks if you've done that

yeah i know it was stupid but would i not get any for the conclusion being right? and the 2 marker afterwards would i get follow through?

Reply 304

JamesExtra

Original post by YA BISH

yeah i know it was stupid but would i not get any for the conclusion being right? and the 2 marker afterwards would i get follow through?

I'm not 100% but I think the conclusion only gets marks if you did the right calculations earlier. Look at a past paper and see if they say what to do if that happens. As for the follow through maybe, I'm not too sure. Worst case scenario you've lost 10 in total for that bit, best case you've only lost around 6 :/

Reply 305

JamesExtra

Original post by YA BISH

yeah i know it was stupid but would i not get any for the conclusion being right? and the 2 marker afterwards would i get follow through?

Plus whatever is under 1% is your critical region. You should have rejected H1 for the 8 marker and accepted it for the second part. Did you put that?

Reply 306

Genty Boy

3

Why is finding probability of:

CC, NICE
CCC, NICE
CCCC, NICE
CCCCC, NICE
CCCCCC, NICE

And adding

incorrect for last question?

Since it needs to be more than twice before he picks a nice chocolate? I got 2/57 with this.

Posted from TSR Mobile

(edited 8 years ago)

Reply 307

2ChemistryIsCool

Original post by swegucation

i got 7/114 i swear no one else got this cos i did

6/20*5/19*14/18

did any one else get this???

I DID THAT BUT I DUNNO IF ITS RIGHT..is it????

Posted from TSR Mobile

Reply 308

Original post by 2ChemistryIsCool

I DID THAT BUT I DUNNO IF ITS RIGHT..is it????

Posted from TSR Mobile

Yeah that's what I got, cos it said probably of having to chose at least 2 before getting one he liked? Bit of a dud question I think cos it can be interpreted either way... Nice ocr

Reply 309

ComputerMaths97

17

Original post by iamJOM

Sometimes they penalise answers given to just 1sf, though if everything else you had done was to a certain number of decimal places or you had written the unrounded answer earlier on then you will probably be fine.

Yeah I think I would've wrote: "0.0307^2 = 0.0307 x 0.0307 = 0.0009"... also, never knew why zeros after a decimal point are not considered "significant figures" they surely are pretty damn significant.

Reply 310

Danny.L

3

Guys, here's a link to a poll for the stats, what do you think an A will be?
http://www.thestudentroom.co.uk/showthread.php?t=3345017

Reply 311

Qwertykeyboard15

5

Think I've lost marks for the given questions and I put the reason for the mode to be useful because the tourist office would know how many people is most likely would come in that day so they can get the right staff in etc 😂 totally different from what everyone else is saying... I didn't see the mean, so would have lost a mark there too 😣

I ran out of time with this exam, needed to have longer to check my answers

Reply 312

leaf3

I know i already posted this so I'm sorry for posting it again but it's eating away at me and I could really do with an answer ;P
I messed up my binomial in the question before the hypothesis testing and so did my hypothesis testing with VERY slightly wrong values, however my values were out by such a small amount I got the correct critical region and conclusion in my hypothesis testing.
I realised my binomial was wrong in the previous question and changed (in an obvious way) just before the end however I didn't have time to change my hypothesis testing values. Will I get error carried forward for this/how many marks will I lose? :O

Reply 313

Lewart

What do you think the A grade boundary will be

Reply 314

Original post by leaf3

I know i already posted this so I'm sorry for posting it again but it's eating away at me and I could really do with an answer ;P
I messed up my binomial in the question before the hypothesis testing and so did my hypothesis testing with VERY slightly wrong values, however my values were out by such a small amount I got the correct critical region and conclusion in my hypothesis testing.
I realised my binomial was wrong in the previous question and changed (in an obvious way) just before the end however I didn't have time to change my hypothesis testing values. Will I get error carried forward for this/how many marks will I lose? :O

Out of 8 you'll probably get 4

Reply 315

Original post by Lewart

What do you think the A grade boundary will be

To me, the paper seemed incredibly similar to the June 2013 paper, so I'm hoping the grade boundaries are also similar.. What is anyone else's thoughts on this? Definitely harder than last yet imo

Reply 316

leaf3

Original post by Jim997

Out of 8 you'll probably get 4

ah that's so annoying, stupid calculator error :frown:

thank you for replying :smile:

Reply 317

AQASUX

7

Were those answers posted before the exam :K:

Reply 318

swegucation

Original post by 2chemistryiscool

i did that but i dunno if its right..is it????

posted from tsr mobile

inshallah

Reply 319