Funny correlation. Would be worth verifying quantitatively. However beware of confusing correlation with cause-effect relation. We don't know which one could b

Funny correlation. Would be worth verifying quantitatively. However beware of confusing correlation with cause-effect relation. We don't know which one could be the cause of the other or there could be a hidden common cause. For instance, if weather is good, people go outside and don't do piracy. If weather is bad, people stay at home and look for entertainment. These are just examples. A funny story is the one with the London taxi drivers. A survey has pointed out a positive and significant correlation between the number of accidents and wearing coats. It was assumed that coats could hinder movements of drivers and be the cause of accident. A new law was prepared to prohibit drivers to wear coats when driving. Finally another study pointed out that people wear coats when it rains! Rain was the hidden factor common to wearing coat and accident frequency.