You are Here: Home >< Maths

# S1 correlation

Announcements Posted on
Why bother with a post grad? Are they even worth it? Have your say! 26-10-2016
1. Is there a faster way of working out r without a fancy calculator, at the moment I will die before I reach question 5 using the formula?
2. What board is this from? Most boards give you Sxy, Sxx and Syy. But this question is worth 3 marks so maybe 2 for Sxx, Syy and Sxy and the final mark for r = Sxy/sqrt(Sxx*Syy)
3. (Original post by TheGreatPumpkin)
Is there a faster way of working out r without a fancy calculator, at the moment I will die before I reach question 5 using the formula?
Purchase a calc

The cheapest one that could solve this is 15 pounds in whsmith

By the time you've finished calculating r manually I'd have finished the paper
4. No you wouldnt!
A 3 mark question allows 3.5 minutes to be answered.
Also good scientific calculators only cost about £8 at most.
5. (Original post by MathsSir)
What board is this from? Most boards give you Sxy, Sxx and Syy. But this question is worth 3 marks so maybe 2 for Sxx, Syy and Sxy and the final mark for r = Sxy/sqrt(Sxx*Syy)
AQA S1 2009 june, I have worked it out but it took about 10 minutes and that is not a good amount of time to spend on a three mark question.
6. (Original post by TheGreatPumpkin)
AQA S1 2009 june, I have worked it out but it took about 10 minutes and that is not a good amount of time to spend on a three mark question.
AQA C2 front cover
Show all necessary working; otherwise marks for method may be lost.
The decision is obviously yours.
7. (Original post by MathsSir)
AQA C2 front cover
Show all necessary working; otherwise marks for method may be lost.
The decision is obviously yours.
I'm sorry what do mean? Naturally I will show workings out, but I don't see how it relate to the question.
8. Have you got a casio fx-85GT? If so, there is a quick way to calculate r

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: May 30, 2016
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:
Today on TSR

### Who is getting a uni offer this half term?

Find out which unis are hot off the mark here

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read here first

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams