condition mean min max ZT0-3 482.54999999999995 482.54999999999995 482.54999999999995 ZT4-7 527.1 527.1 527.1 ZT8-11 568.15 568.15 568.15 ZT12-15 606.75 606.75 606.75 ZT16-19 539.55 539.55 539.55 ZT20-23 438.20000000000005 438.20000000000005 438.20000000000005