condition mean min max ZT0-3 3495.6 3495.6 3495.6 ZT4-7 3848.6 3848.6 3848.6 ZT8-11 3306.7 3306.7 3306.7 ZT12-15 3169.65 3169.65 3169.65 ZT16-19 3002.3500000000004 3002.3500000000004 3002.3500000000004 ZT20-23 3110.25 3110.25 3110.25