condition mean min max ZT0-3 18.244164 18.244164 18.244164 ZT4-7 14.1312775 14.1312775 14.1312775 ZT8-11 13.7505155 13.7505155 13.7505155 ZT12-15 13.161204000000001 13.161204000000001 13.161204000000001 ZT16-19 12.476244000000001 12.476244000000001 12.476244000000001 ZT20-23 14.763694000000001 14.763694000000001 14.763694000000001