condition mean min max ZT0-3 0.8334805000000001 0.443521 1.22344 ZT4-7 1.3250715 1.3250715 1.3250715 ZT8-11 1.2501165 1.2501165 1.2501165 ZT12-15 0 0 0 ZT16-19 1.6562350000000001 1.6562350000000001 1.6562350000000001 ZT20-23 1.138178 1.138178 1.138178