condition mean min max ZT0-3 1.5211435 1.341825 1.700462 ZT4-7 1.0101025 1.0101025 1.0101025 ZT8-11 1.6945099999999997 1.6945099999999997 1.6945099999999997 ZT12-15 0 0 0 ZT16-19 1.5055325 1.5055325 1.5055325 ZT20-23 2.85428 2.85428 2.85428