condition mean min max ZT0-3 239.1 239.1 239.1 ZT4-7 321.8 321.8 321.8 ZT8-11 204.89999999999998 204.89999999999998 204.89999999999998 ZT12-15 252.1 252.1 252.1 ZT16-19 237.0 237.0 237.0 ZT20-23 251.85 251.85 251.85