condition mean min max ZT0-3 228.15 228.15 228.15 ZT4-7 135.6 135.6 135.6 ZT8-11 215.3 215.3 215.3 ZT12-15 328.29999999999995 328.29999999999995 328.29999999999995 ZT16-19 427.5 427.5 427.5 ZT20-23 274.6 274.6 274.6