condition mean min max ZT0-3 983.2049999999999 882.762 1104.965 ZT4-7 1018.6465000000001 1018.6465000000001 1018.6465000000001 ZT8-11 955.3944999999999 955.3944999999999 955.3944999999999 ZT12-15 962.63975 911.549 1013.7305 ZT16-19 1093.815 1093.815 1093.815 ZT20-23 859.4665 859.4665 859.4665