condition mean min max ZT0-3 1746.384659 1746.384659 1746.384659 ZT4-7 1869.2268515 1869.2268515 1869.2268515 ZT8-11 1470.6186360000002 1470.6186360000002 1470.6186360000002 ZT12-15 1716.1783730000002 1716.1783730000002 1716.1783730000002 ZT16-19 1371.426378 1371.426378 1371.426378 ZT20-23 1240.340134 1240.340134 1240.340134