condition mean min max ZT0-3 120.581099 120.581099 120.581099 ZT4-7 151.857231 151.857231 151.857231 ZT8-11 146.4635265 146.4635265 146.4635265 ZT12-15 147.0782105 147.0782105 147.0782105 ZT16-19 192.648784 192.648784 192.648784 ZT20-23 189.45129450000002 189.45129450000002 189.45129450000002