condition mean min max ZT0-3 22.892819 22.892819 22.892819 ZT4-7 19.0556185 19.0556185 19.0556185 ZT8-11 20.124796 20.124796 20.124796 ZT12-15 21.690526 21.690526 21.690526 ZT16-19 34.132359 34.132359 34.132359 ZT20-23 25.2427705 25.2427705 25.2427705