condition mean min max ZT0-3 34.930125000000004 30.7574 39.102850000000004 ZT4-7 32.41985 32.41985 32.41985 ZT8-11 32.46455 32.46455 32.46455 ZT12-15 0 0 0 ZT16-19 59.825050000000005 59.825050000000005 59.825050000000005 ZT20-23 39.10725 39.10725 39.10725