condition mean min max ZT0-3 258.6191 258.6191 258.6191 ZT4-7 330.02126 330.02126 330.02126 ZT8-11 306.9279205 306.9279205 306.9279205 ZT12-15 326.6967055 326.6967055 326.6967055 ZT16-19 334.1766295 334.1766295 334.1766295 ZT20-23 319.4207425 319.4207425 319.4207425