condition mean min max ZT0-3 486.84999999999997 486.84999999999997 486.84999999999997 ZT4-7 423.7 423.7 423.7 ZT8-11 544.8499999999999 544.8499999999999 544.8499999999999 ZT12-15 695.4 695.4 695.4 ZT16-19 598.35 598.35 598.35 ZT20-23 564.8 564.8 564.8