The "above six foot" rule seems like it's just a round number, but in the US at least:
* height is normally distributed for men.
* The average height of a man is 5'9".
* The standard deviation for men's height is 3".
So six foot is one standard deviation above average. I am sure one or more of the above does not hold for NZ. I just think this is neat, that the commonly stated preference happens to be for one standard deviation above the average.
A neat coincidence only. America consists of lots of ethnicities. Some bring that average up and some bring it down. There’s some preference for intra-ethnicity dating.
* height is normally distributed for men.
* The average height of a man is 5'9".
* The standard deviation for men's height is 3".
So six foot is one standard deviation above average. I am sure one or more of the above does not hold for NZ. I just think this is neat, that the commonly stated preference happens to be for one standard deviation above the average.