condition mean min max ZT0-3 546.4324999999999 525.0889999999999 567.776 ZT4-7 419.81899999999996 419.81899999999996 419.81899999999996 ZT8-11 529.0595000000001 529.0595000000001 529.0595000000001 ZT12-15 0 0 0 ZT16-19 577.4835 577.4835 577.4835 ZT20-23 645.9375 645.9375 645.9375