condition mean min max ZT0-3 60.37242571 34.32257201 86.42227941 ZT4-7 159.58814095 154.4720567 164.7042252 ZT8-11 191.50623662499999 184.767329 198.24514425 ZT12-15 198.55845019999998 178.18453 218.9323704 ZT16-19 230.97943305 220.68056700000002 241.27829909999997 ZT20-23 209.10055275000002 192.11237720000003 226.0887283