condition mean min max ZT0-3 1784.95 1784.95 1784.95 ZT4-7 1469.6 1469.6 1469.6 ZT8-11 1236.9 1236.9 1236.9 ZT12-15 1088.4499999999998 1088.4499999999998 1088.4499999999998 ZT16-19 1091.5 1091.5 1091.5 ZT20-23 1242.55 1242.55 1242.55