R36 : means to game the Sharpe ratio returns, monthly, statements, single

DoubleDip

V5, p87, the two statements in the last paragraph :

1. Does it mean ?
Yearly SD < monthly SD x 12^1/2 < weekly x 12^1/2 < daily SD < 250^1/2 ?
SD : Standard Deviation, ^1/2 : Square Root

2. Does it mean ?
The mean return used in the numerator of the calculated Sharpe ration is resulted from
compounding 12 months returns while the Standard Deviation from a single month's
return (or the mean of 12 month returns) is used in the denominator ?

Anyone can advise ?