condition mean min max ZT0-3 3.4482299999999997 3.411375 3.4850849999999998 ZT4-7 6.350720000000001 6.350720000000001 6.350720000000001 ZT8-11 3.668605 3.668605 3.668605 ZT12-15 0 0 0 ZT16-19 6.490515 6.490515 6.490515 ZT20-23 6.927854999999999 6.927854999999999 6.927854999999999