condition mean min max ZT0-3 28.25432029 25.50451991 31.00412067 ZT4-7 444.04678502499996 297.5626779 590.53089215 ZT8-11 900.45139475 837.5504802 963.3523092999999 ZT12-15 1710.6954004999998 1568.5344905 1852.8563104999998 ZT16-19 1018.1982213250001 960.2194269 1076.17701575 ZT20-23 883.8964633 809.8605997 957.9323269