condition mean min max ZT0-3 259.0295 231.936 278.1355 ZT4-7 238.53 238.53 238.53 ZT8-11 132.582 132.582 132.582 ZT12-15 178.127 157.0445 199.2095 ZT16-19 210.62650000000002 210.62650000000002 210.62650000000002 ZT20-23 232.087 232.087 232.087