condition mean min max ZT0-3 3256.8999999999996 3256.8999999999996 3256.8999999999996 ZT4-7 4929.8 4929.8 4929.8 ZT8-11 4385.85 4385.85 4385.85 ZT12-15 4646.7 4646.7 4646.7 ZT16-19 4043.4 4043.4 4043.4 ZT20-23 3320.75 3320.75 3320.75