condition mean min max ZT0-3 229.35 229.35 229.35 ZT4-7 319.4 319.4 319.4 ZT8-11 287.1 287.1 287.1 ZT12-15 385.29999999999995 385.29999999999995 385.29999999999995 ZT16-19 251.6 251.6 251.6 ZT20-23 290.85 290.85 290.85