condition mean min max ZT0-3 149.217497 149.217497 149.217497 ZT4-7 210.863422 210.863422 210.863422 ZT8-11 238.0147575 238.0147575 238.0147575 ZT12-15 225.62602700000002 225.62602700000002 225.62602700000002 ZT16-19 186.89326 186.89326 186.89326 ZT20-23 149.8993135 149.8993135 149.8993135