He does include:DisclaimerFinally, in light of some of the more vocal criticism I’ve received, I feel I should reiterate a few points: At no point have I ever claimed that this is even close to a rigorous analysis. In my original tweet and here I have made it clear that I have used data from Wikipedia. Since I thought it was common knowledge that Wikipedia should never be used as a primary source for any kind of real research, I didn’t expect people to confuse this post with a serious study. I have not attempted to use these plots to draw any kind of conclusion about the relationship between gun ownership and gun deaths. Indeed, I do not think there exists a simple explanation. All I intended to do was attempt to shed some light on a question I was asked about a possible correlation. I will not run any kind of statistical test on the above data (e.g., rank correlation coefficients). For any such quantity to be meaningful I would need to assume that the data I collected was much more carefully controlled for. Since I just grabbed it from Wikipedia, this is clearly not a valid assumption. I do not intend to create more graphs showing other data or other statistics. Other people (see the links above) have already done so for a variety of alternative data. Also, I realise their are better sources of data out there than Wikipedia. However, as I’ve said before, my intention was not to do a definitive study but rather show how a readily accessible source (i.e., Wikipedia) can be used to quickly get an overview of a topic.
I will probably not the last person to use Wikipedia for this sort of amateur analysis. Therefore, if you believe the data I have used is incorrect or out of date, I suggest you solve the problem at the source and update (with references) the relevant entries on Wikipedia.
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发表于 2015-10-3 11:32
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发表于 2015-10-3 12:02