condition mean min max ZT0-3 4.5424549999999995 4.250629999999999 4.83428 ZT4-7 5.32004 5.32004 5.32004 ZT8-11 4.58312 4.58312 4.58312 ZT12-15 0 0 0 ZT16-19 4.61008 4.61008 4.61008 ZT20-23 5.242125 5.242125 5.242125