condition mean min max ZT0-3 10.642533 10.642533 10.642533 ZT4-7 10.445130500000001 10.445130500000001 10.445130500000001 ZT8-11 9.3379555 9.3379555 9.3379555 ZT12-15 9.3070055 9.3070055 9.3070055 ZT16-19 10.078161000000001 10.078161000000001 10.078161000000001 ZT20-23 10.242672500000001 10.242672500000001 10.242672500000001