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Any followers with a bit of statistics or probability knowledge able to point me in the right direction here?

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Thanks! Seems like it should have something to do with chi squared but I'm scratching my head.

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I would post this on askscience subreddit. At the very least, we would get a walk thru from an expert in stats. I am curious myself.

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I put it up here, apparently chi squared is right but confirmation would be useful math.stackexchange.com/questions/2271

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PS:. Thank you so much for your email earlier on how to improve Reddit search. I am going to get to work on this soon.