condition mean min max ZT0-3 204.351568 204.351568 204.351568 ZT4-7 158.550621 158.550621 158.550621 ZT8-11 90.551942 90.551942 90.551942 ZT12-15 145.153839 145.153839 145.153839 ZT16-19 31.3867695 31.3867695 31.3867695 ZT20-23 38.1070285 38.1070285 38.1070285