condition mean min max ZT0-3 534.6 534.6 534.6 ZT4-7 444.7 444.7 444.7 ZT8-11 511.3 511.3 511.3 ZT12-15 811.8 811.8 811.8 ZT16-19 1016.8000000000001 1016.8000000000001 1016.8000000000001 ZT20-23 612.4000000000001 612.4000000000001 612.4000000000001