x Turn on thread page Beta
 You are Here: Home >< Maths

# Statistics S1B 17/05/2013 Thread watch

1. (Original post by seajamiet)
This is EXACTLY the same as what happens to me. The Maths seems to be fine for me its just the questions where you have to comment in context or explain why.
There was a question where it said why this data is not likely to be normally distributed? (2marks)

The data is not symmetric thus it is unlikely to be normally distributed

I understand it but seriously how was I suppose to know that was the answer :|

This was posted from The Student Room's iPhone/iPad App
2. (Original post by Son234)
It's really simple

At first you have 3 choices either labour, conservative, lib dem + other

At the Second you have 2 choices either conservative or lib dem+other

At the final you have 1 choice

3X2X1=6

So you multiply your probability by 6

:-)

This was posted from The Student Room's iPhone/iPad App

Ah I see, thanks very much
3. Is there anyone here who isn't using a statistics calculator for this exam?
Our teacher decided that we're doing fine without it so we never got them
4. (Original post by ollyhal)
I am very confident in this exam and am offering any help or guidance needed. I
Can you explain, in very plain English to someone who detests statistics because she's hopeless at it, the Central Limit Theorem, when it can be used and when it need not be used?

I'm afraid I'm self studying and this CLT completely foxes me.

Thanks
5. (Original post by maggiehodgson)
Can you explain, in very plain English to someone who detests statistics because she's hopeless at it, the Central Limit Theorem, when it can be used and when it need not be used?

I'm afraid I'm self studying and this CLT completely foxes me.

Thanks
Depends on the question

But you use it for when you have a sample of n>30

And the mean (U) of it is normally distributed (mean U, variance/n)

And you just normalise the probability you want (:

This was posted from The Student Room's iPhone/iPad App
6. (Original post by Gotzz)
Is there anyone here who isn't using a statistics calculator for this exam?
Our teacher decided that we're doing fine without it so we never got them
Do you mean graphical calculator?

Or just having no calculator? Lol

This was posted from The Student Room's iPhone/iPad App
7. (Original post by Son234)
Depends on the question

Sometimes the questions asks "where in this question, if at all, did you use the CLT".

Sometimes you don't need to even though you're told that the data is a sample.
8. (Original post by maggiehodgson)
Sometimes the questions asks "where in this question, if at all, did you use the CLT".

Sometimes you don't need to even though you're told that the data is a sample.
Yes CLT was used quote your sample
Size say ==> n>30 (that's your reason)

2marks

This was posted from The Student Room's iPhone/iPad App
9. I'm sure I've seen times when the mark scheme (AQA SS1B) says no it was not used. If I can find an example I'll post it and see what you think.
10. (Original post by maggiehodgson)
I'm sure I've seen times when the mark scheme (AQA SS1B) says no it was not used. If I can find an example I'll post it and see what you think.
If its state why the use of CLT was not necessary?

Whatever your variable e.g weight of flour etc is normally distributed

This was posted from The Student Room's iPhone/iPad App
11. what your guys feeling on tmrows paper? i think its gnna be easy
12. (Original post by Craming Revision)
what your guys feeling on tmrows paper? i think its gnna be easy
Should be alright/ok I guess ? But then again it is AQA lol

How much revision have you done for S1 ? Any other exams tomorrow ?
13. (Original post by Tha Realest)
Should be alright/ok I guess ? But then again it is AQA lol

How much revision have you done for S1 ? Any other exams tomorrow ?
im a2 s1 is basically an easy version of s4/s5 so practically been doing s1 all year and last year i got a B in s1 in jan but going for full ums this time round, got an A in s4 and thats alot harder compared to s1 so who knows
14. (Original post by Craming Revision)
im a2 s1 is basically an easy version of s4/s5 so practically been doing s1 all year and last year i got a B in s1 in jan but going for full ums this time round, got an A in s4 and thats alot harder compared to s1 so who knows
Ok right cool.

Btw if you don't mind me asking what did your revision consist of for S1 ?
15. (Original post by Tha Realest)
Ok right cool.

Btw if you don't mind me asking what did your revision consist of for S1 ?
done every question x4 times.
16. could someone here help me out with a statistics question II just can't figure out?
17. (Original post by Craming Revision)
done every question x4 times.
Smashed it lol.

Btw can you help with Q2(c) Jan 2011 paper I understand how it is 0.026 for 2 marks , but why do we need to multiply by 3 or 6 for the other 2 marks ??

And how did they get an answer of 0.155 (to 0.157) ?

Thanks
18. Need help with January 2008 question 5; parts a(ii) and (iii) and d.

http://ddouis.free.fr/css/alevel/stats_1/Jan2008.pdf

Probability is what I always lose marks on
19. (Original post by Son234)
Do you mean graphical calculator?

Or just having no calculator? Lol

This was posted from The Student Room's iPhone/iPad App
Sorry, yeah, graphical calculator.
I use a regular calculator.
20. Does anyone know how to type a grouped frequency table in a Casio calculator ?? so for example : 0.95-0.97 , 0.98-100 etc ....

Thanks

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: May 27, 2013
Today on TSR

### Boyfriend slept with someone else

...we were on a break

### Mum says she'll curse me if I don't go to uni

Poll
Useful resources

Can you help? Study help unanswered threadsStudy Help rules and posting guidelinesLaTex guide for writing equations on TSR

## Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE