That would be statistically totally insignificant and irrelevant, though. You need statistical significance to find a correlation - otherwise you're merely discussing a random result.
Few serious people will consider a study interesting if it lacks statistical relevance.
He can formulate a hypothesis, of course. He just cannot test it properly without obeying basic statistical principles. Anecdotical evidence can easily be countered with conflicting anecdotical evidence - which means that anecdotical evidence is useless.
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