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 Post subject: PercentilePosted: Sun Oct 27, 2013 8:48 am

Joined: Sun Oct 27, 2013 8:19 am
Posts: 51
Can anyone tell me what percentile a maths score of 111 would be in Ashford, kent? I have found plenty information on percentiles and age standardisation but having difficulty working out the answer.

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 Post subject: Re: PercentilePosted: Sun Oct 27, 2013 10:30 am

Joined: Wed Jan 18, 2012 11:41 am
Posts: 5643
Location: Essex
I may be the only person not really understanding your question, but possibly not as you have had no other replies...

111 in what maths test?

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 Post subject: Re: PercentilePosted: Sun Oct 27, 2013 11:15 am

Joined: Tue Oct 19, 2010 11:30 am
Posts: 110
If that's a standardised 11+ score then 111 is around the 63rd percentile.

If it's a standardised CATs score then it's around the 75th percentile (and equates to about 120 on the 11+).

The standardisations are done nationally so it's impossible to say how Ashford may differ from the national distribution although it is well known we have fat tails in Kent but I doubt it would change things by more than a percentile or two at that point of the distribution.

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 Post subject: Re: PercentilePosted: Sun Oct 27, 2013 11:53 am

Joined: Sun Oct 27, 2013 8:19 am
Posts: 51
Sorry. I should have said its an 11+ standardised maths score. My only reason for mentioning Ashford was to avoid information relating to west kent as I believe its different there. Thank you for your response.
KCC have sent me the raw score and I have calculated the percentage from that. I have asked them what raw score my daughter would have needed to pass the test at her age ( I'm assuming she will be classed as age 11 as she was only 2 weeks away from her 11th birthday. Can anyone think of anything else I could ask KCC which might be useful to know in order to get a more accurate result from them?

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 Post subject: Re: PercentilePosted: Sun Oct 27, 2013 12:23 pm

Joined: Mon Jun 18, 2007 2:32 pm
Posts: 7063
Location: East Kent
for standardised scores you usually take age as years and number of complete months, so she will be 10 years 11 months

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 Post subject: Re: PercentilePosted: Sun Oct 27, 2013 12:53 pm

Joined: Sun Oct 27, 2013 8:19 am
Posts: 51
Thank you.

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 Post subject: Re: PercentilePosted: Mon Oct 28, 2013 4:28 pm

Joined: Tue Oct 19, 2010 11:30 am
Posts: 110
Shiv wrote:
...
KCC have sent me the raw score and I have calculated the percentage from that.
...

F.Y.I.

That's a percentage which is not the same as a percentile. The two are not related in any useful way. You need the standardised score and the moments of the distribution to calculate the percentile.

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 Post subject: Re: PercentilePosted: Mon Oct 28, 2013 5:47 pm

Joined: Sun Oct 27, 2013 8:19 am
Posts: 51
Thank you. I will see if I can find out that information.

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