condition mean min max ZT0-3 233.35 233.35 233.35 ZT4-7 226.2 226.2 226.2 ZT8-11 230.10000000000002 230.10000000000002 230.10000000000002 ZT12-15 289.65 289.65 289.65 ZT16-19 317.1 317.1 317.1 ZT20-23 288.54999999999995 288.54999999999995 288.54999999999995