condition mean min max ZT0-3 1.86006 1.6357300000000001 2.08439 ZT4-7 2.11079 2.11079 2.11079 ZT8-11 2.1611700000000003 2.1611700000000003 2.1611700000000003 ZT12-15 0 0 0 ZT16-19 5.412045 5.412045 5.412045 ZT20-23 2.5293 2.5293 2.5293