condition mean min max ZT0-3 18.2692016025 11.88615366 24.652249545 ZT4-7 25.2878351675 25.0210074 25.554662935000003 ZT8-11 10.846727321 8.0298854065 13.663569235499999 ZT12-15 2.4942354567500002 1.9262810345 3.062189879 ZT16-19 8.405081247750001 6.560360419 10.2498020765 ZT20-23 15.573684377500001 15.20367919 15.943689565