condition mean min max ZT0-3 256.243206 256.243206 256.243206 ZT4-7 223.2107885 223.2107885 223.2107885 ZT8-11 289.1690645 289.1690645 289.1690645 ZT12-15 238.41303 238.41303 238.41303 ZT16-19 249.66099 249.66099 249.66099 ZT20-23 226.942473 226.942473 226.942473