condition mean min max ZT0-3 0.628638 0.515489 0.741787 ZT4-7 0.6298115 0.6298115 0.6298115 ZT8-11 0.9099980000000001 0.9099980000000001 0.9099980000000001 ZT12-15 0 0 0 ZT16-19 1.6355 1.6355 1.6355 ZT20-23 0.8991715 0.8991715 0.8991715