condition mean min max ZT0-3 4.760809999999999 4.7300699999999996 4.79155 ZT4-7 4.7088 4.7088 4.7088 ZT8-11 6.4086 6.4086 6.4086 ZT12-15 0 0 0 ZT16-19 6.920055 6.920055 6.920055 ZT20-23 5.84525 5.84525 5.84525