You are Here: Home >< Maths

# Simpson's Rule OCR MEI Numerical Methods

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016
1. I've just been entirely defeated by an NM past paper question (Jan 2007 Q7).

I've found the wrong Simpson's estimates. Rather than finding them for h = 0.5 and h = 0.25, I have seemingly found them for h = 0.25 and h = 0.125 (respectively) instead.

Having checked my textbook and the specification to work out why, they contradict each other. The textbook says that Simpson's rule with n strips, is given by

Where and are the trapezium and midpoint estimates.

The specification however says that

Where and are defined as before and is the Simpson's estimate with 2n strips.

So what is the strip number in Simpson's Rule? Is it the number of strips used in the Midpoint and Trapezium rule to get that Simpson's estimate, or is it twice that number? The latter would give me the right answer but the former is what I was taught.
2. (Original post by 16Characters....)
I've just been entirely defeated by an NM past paper question (Jan 2007 Q7).

I've found the wrong Simpson's estimates. Rather than finding them for h = 0.5 and h = 0.25, I have seemingly found them for h = 0.25 and h = 0.125 (respectively) instead.

Having checked my textbook and the specification to work out why, they contradict each other. The textbook says that Simpson's rule with n strips, is given by

Where and are the trapezium and midpoint estimates.

The specification however says that

Where and are defined as before and is the Simpson's estimate with 2n strips.

So what is the strip number in Simpson's Rule? Is it the number of strips used in the Midpoint and Trapezium rule to get that Simpson's estimate, or is it twice that number? The latter would give me the right answer but the former is what I was taught.
the former is correct. the mark scheme must be wrong
3. (Original post by 16Characters....)
...
(Original post by HapaxOromenon2)
the former is correct. the mark scheme must be wrong
I'm confused as well now: this, this and this say it is and the explanation given in the latter link makes complete sense.
4. (Original post by HapaxOromenon2)
the former is correct. the mark scheme must be wrong
(Original post by Zacken)
I'm confused as well now: this, this and this say it is and the explanation given in the latter link makes complete sense.
Thanks for the help.

## 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: April 2, 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

### How does exam reform affect you?

From GCSE to A level, it's all changing

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