condition mean min max ZT0-3 170.369 159.8845 180.8535 ZT4-7 129.68900000000002 129.68900000000002 129.68900000000002 ZT8-11 129.6645 129.6645 129.6645 ZT12-15 0 0 0 ZT16-19 228.30450000000002 228.30450000000002 228.30450000000002 ZT20-23 231.235 231.235 231.235