condition mean min max ZT0-3 559.9000000000001 559.9000000000001 559.9000000000001 ZT4-7 440.4 440.4 440.4 ZT8-11 512.6 512.6 512.6 ZT12-15 489.85 489.85 489.85 ZT16-19 509.25 509.25 509.25 ZT20-23 526.3499999999999 526.3499999999999 526.3499999999999