condition mean min max ZT0-3 147.39999999999998 147.39999999999998 147.39999999999998 ZT4-7 187.0 187.0 187.0 ZT8-11 208.55 208.55 208.55 ZT12-15 250.75 250.75 250.75 ZT16-19 148.2 148.2 148.2 ZT20-23 127.9 127.9 127.9