condition mean min max ZT0-3 0.5193512499999999 0.431739 0.6069635 ZT4-7 0.8035415 0.8035415 0.8035415 ZT8-11 1.169933 1.169933 1.169933 ZT12-15 0 0 0 ZT16-19 0.6069720000000001 0.6069720000000001 0.6069720000000001 ZT20-23 1.645765 1.645765 1.645765