condition mean min max ZT0-3 84.66839999999999 35.63575 172.23399999999998 ZT4-7 130.8143 130.8143 130.8143 ZT8-11 55.89185 55.89185 55.89185 ZT12-15 58.465999999999994 49.41595 67.51604999999999 ZT16-19 32.94005 32.94005 32.94005 ZT20-23 61.1443 61.1443 61.1443