condition mean min max ZT0-3 57.801437 57.801437 57.801437 ZT4-7 49.431406 49.431406 49.431406 ZT8-11 53.011268 53.011268 53.011268 ZT12-15 57.898507 57.898507 57.898507 ZT16-19 90.4528765 90.4528765 90.4528765 ZT20-23 74.4423525 74.4423525 74.4423525