As ice cream sales in the United States increase, so do deaths in in developed parts of Africa.
I use this fact to explain to students how true information can be used to mislead people into drawing wild, deranged conclusions.
The commonality in these events is the rise in temperature during the summer. But if you leave that out, there's an absurd argument to be made about how purchasing ice cream is inherently evil.
I don't think it's an amazing example of what OP is talking about, but as an example, I like how simple and easy to follow it is. Great for junior high level kids.
Correlation at least tries to imply they're related. As lottery sales go up in your household so does credit card debt. Not always a cause but they're related
You're looking for spurious correlations which is when numbers have no business even being used in a comparison
Oh yes I got my definition of correlation slightly wrong. Correlation doesn't necessarily mean that two things have the same cause but they do relate in some way either by having a common cause or by occuring in the same system. They definitely have more in common than happening just at the same time or right after each other like a coincidence.
I didn't claim that correlation equals causation and I hope you didn't get the impression because this would be oviously wrong.
Edit: I stand corrected and today I learned that "correlation" means that two things have a statistical relation without any causal relation implied. There can be a causal relation but it's not necessary. The key takeaway for me is that correlation describes a statistical relationship.
So there's some "incorrect" assumptions you have made about the North American summer, and weather in Africa. In the North American summer, only North Africa experiences summer with you guys. The rest of the continent is blanketed in rains (West, Central and East Africa) or are in outright winter (Southern Africa). So our temperatures do come down in your winter. Your coldest months are our hottest months for most of the continent (except for North Africa). So saying the developed parts of Africa
In equally unrelated news, there's also a direct correlation between ice cream sales and shark attacks. We have to steal all the ice cream before more people get eaten!