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Author Excel Confidence Interval
ed
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Registered: 10th Sep 03
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19th Jan 12 at 11:20   View User's Profile U2U Member Reply With Quote

Not sure where else to ask apart from my favourite general purpose internet forum, so here goes...

I've used CONFIDENCE(alpha,std_dev,size) to calculate a 90% confidence interval which is for example: 0.008192438. On my table I would like to be able to display this in the standard way, which would be 0.20±0.008192438 - is it possible to do this? (Probably should be working at 2 DP too actually).

Also, how do I then use this data to create error bars on by bar chart output? I'd been using SPSS in the past for this, but the charts it outputs are a bit rubbish and I'm a n00b at all this sort of stuff.

Links, tutorials or anything would be appreciated

[Edited on 19-01-2012 by ed]
Ian
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Registered: 28th Aug 99
Location: Liverpool
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19th Jan 12 at 11:21   View Garage View User's Profile U2U Member Reply With Quote

First one, complete guess but can you not just CONCAT a string together of all your bits?

Other stuff I've no idea, sorry.
ed
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Registered: 10th Sep 03
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20th Jan 12 at 13:52   View User's Profile U2U Member Reply With Quote

Answered my own question, you can setup custom error bars in Excel - I wish I knew how to do this a year ago instead of pissing about with SPSS - I don't know how IBM can sell such buggy crappy software?
ed
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Registered: 10th Sep 03
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20th Jan 12 at 13:52   View User's Profile U2U Member Reply With Quote

Will try what you said for the tabulated data Ian - cheers

 
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