condition mean min max ZT0-3 19.86958 19.86958 19.86958 ZT4-7 20.7033605 20.7033605 20.7033605 ZT8-11 14.4255755 14.4255755 14.4255755 ZT12-15 12.626708 12.626708 12.626708 ZT16-19 10.169796999999999 10.169796999999999 10.169796999999999 ZT20-23 10.961247499999999 10.961247499999999 10.961247499999999