condition mean min max ZT0-3 148.638252 148.638252 148.638252 ZT4-7 149.099163 149.099163 149.099163 ZT8-11 140.574456 140.574456 140.574456 ZT12-15 145.93201299999998 145.93201299999998 145.93201299999998 ZT16-19 146.847441 146.847441 146.847441 ZT20-23 154.12393250000002 154.12393250000002 154.12393250000002