Just to restate the obvious: I suspect that to win the prize using this type of claim, you would need to predict something that is not already in any way accessible to you. Any claim that an unusual number of x (athletes, etc.) were born under the sign of... would be too easily manipulated to show a desired result (either by how one defines athletes, or by how the astrological sign is calculated or interpreted). And as mentioned, there are things (month allowed to enter school) that can further distort this without any dishonesty on the part of the astrologer. Also broad descriptions of individuals based on astrology are prone to a form of conformation bias ("You were born under the sign of Cancer, so you are very intelligent..." "Amazing- I am!").
Can you predict traits of animals based on when they were born? This could make a prospective test easier and quicker.
Can you predict traits of animals based on when they were born? This could make a prospective test easier and quicker.