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Statistics 1 S1. 6th June 2014

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Sorry, this is an AQA thread.

Sorry I just noticed! I found it eventually good luck tomorrow and I hope you get the high marks you all deserve (I can say that because it doesn't effect OCR grade boundaries)

Reply 21

mike256

Original post by Marthajones123

Sorry I just noticed! I found it eventually good luck tomorrow and I hope you get the high marks you all deserve (I can say that because it doesn't effect OCR grade boundaries)

That's OK. Thank you for the kind words :smile:

Reply 22

Maths Genie

This thread was actually for AQA Syllabus and not OCR/MEI. Sorry for not mentioning that

Reply 23

Maths Genie

This thread is for AQA syllabus and not MEI/OCR. Sorry for not mentioning that.

Reply 24

Hopstano

Whats the topic that has like (20,0.5^2) :/ it's keep coming up in the past papers and I can't seem to find it in the book

Reply 25

R-123

Original post by brocklehurst95

Haha don't be ashamed, it's the least I could do. Let's hope we'll be laughing after the exam tomorrow!

Yeh -fingers crossed!

After the disaster of core 2, I need this to be nice!!!

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Reply 26

Lookovertherez

Who's ready then?! Anyone doing some last minute revision?

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Reply 27

Lookovertherez

Why is it always that the most inactive threads are the exam boards I take? Why?!?!

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Reply 28

Hopstano

Original post by Lookovertherez

Who's ready then?! Anyone doing some last minute revision?

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I am

Reply 29

MarkProbio

I'm just relaxing. Tiring myself out doing papers I've already done isn't going to help me personally. :smile:

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Reply 30

Deviceing

Original post by kiyubi

probability of A is 0.70 that john attends an event
probability of B is 0.55 that mary attend an event
probability of A and B is 0.45 is that john and mary attend the same event

what is the probability of
that either john or mary or both attend a particular event?

1 - 0.3 * 0.45 = 0.865

Reply 31

lllllllllll

lol forgot I had exam today until I saw this thread. (Thought it was on Monday)

Reply 32

Deviceing

Is this exam at 13:00 or 13:30?

Reply 33

Hopstano

Original post by Deviceing

Is this exam at 13:00 or 13:30?

13:30 for us, but you should get there early just incase :biggrin:

Reply 34

Lookovertherez

Unofficial mark scheme on this thread after?

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Reply 35

username1082804

Good luck everyone!! :smile:

I am sure you are all going to ace it!

Reply 36

BitWindy

I reckon I aced it.

That was easier than expectations, the grade boundaries are going to be pretty high.

Reply 37

BitWindy

Here's what I remember:

The number 0.029 came up twice

The PPMCC was 0.9 something

The CI at the end was 118+-18.7

You had to reduce the sample size by one each time you multiplied the next probability in the last Q of the hairs/eyes question.

Using x=525 is unrealistic because it gives a negative value for y

Reply 38

Kathrynsworld

I can probably help with an unofficial mark scheme

Reply 39

Lookovertherez

Binomial question: mean and variance at the end: mean=108 var=30.2

Normal distribution question: p(Xnot equalling) was 1
The last part (b) find the standard deviation was 0.0242

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