condition mean min max ZT0-3 239.23868 239.23868 239.23868 ZT4-7 190.546451 190.546451 190.546451 ZT8-11 193.824805 193.824805 193.824805 ZT12-15 206.74841800000002 206.74841800000002 206.74841800000002 ZT16-19 223.0631735 223.0631735 223.0631735 ZT20-23 196.6768645 196.6768645 196.6768645