condition mean min max ZT0-3 198.4 198.4 198.4 ZT4-7 327.9 327.9 327.9 ZT8-11 309.35 309.35 309.35 ZT12-15 266.0 266.0 266.0 ZT16-19 186.39999999999998 186.39999999999998 186.39999999999998 ZT20-23 174.0 174.0 174.0