We were told a rather interesting fact during my last Strategy class.
Did you know that in New York City there is a strong correlation between the amount of ice cream sold and the amount of people murdered? Well, believe it or not it’s quite true, very predictably when ice cream sales rise, so to do the amount of chalk outlines on the street.
So, what could be the reasoning for this high correlation? You could reason that either
a - Ice cream actually whips (no pun intended) people up into a murderous rage
The answer is... of course neither of those options and the reason for the correlation is actually the summer weather and the accompanying heat which seems makes people a tad more murderous than when it is cold.
The moral of the story, two sets of figures correlating may not tell much of the story.