condition mean min max ZT0-3 258.7649559 222.15572780000002 295.37418399999996 ZT4-7 295.37573937499997 227.34606954999998 363.4054092 ZT8-11 214.77947529 174.17835818 255.3805924 ZT12-15 43.3553240225 26.13850413 60.572143915 ZT16-19 50.013482662499996 37.666913025 62.3600523 ZT20-23 97.54637933 79.98380219 115.10895646999998