condition mean min max ZT0-3 198.3735 139.2545 257.4925 ZT4-7 156.489 156.489 156.489 ZT8-11 62.76625 62.76625 62.76625 ZT12-15 0 0 0 ZT16-19 184.1325 184.1325 184.1325 ZT20-23 312.5855 312.5855 312.5855