condition mean min max ZT0-3 10.68558 10.30631 11.06485 ZT4-7 9.148119999999999 9.148119999999999 9.148119999999999 ZT8-11 8.36254 8.36254 8.36254 ZT12-15 0 0 0 ZT16-19 9.64553 9.64553 9.64553 ZT20-23 10.3719 10.3719 10.3719