Which statement is not correct?

The coupon rate of Treasury notes is rounded down from stop$-$out yield to the nearest $\frac{1}{8}$ th if needed.

The highest bid yield accepted is called 'Stop Out'. Bidders who bid less than the stop$-$out yield receive their full allotment.

The U$.$S$.$ Treasury sells T$-$notes and T$-$bonds through competitive and noncompetitive single$-$price treasury auctions

Single$-$Price Treasury auctions means all winning bidders pay the same price, which is the highest acceptable price.