condition mean min max ZT0-3 10.244567 10.244567 10.244567 ZT4-7 10.767512 10.767512 10.767512 ZT8-11 10.860103500000001 10.860103500000001 10.860103500000001 ZT12-15 11.267709 11.267709 11.267709 ZT16-19 10.554147 10.554147 10.554147 ZT20-23 10.5855765 10.5855765 10.5855765