condition mean min max ZT0-3 6.7396825 6.18371 7.295655 ZT4-7 2.879975 2.879975 2.879975 ZT8-11 9.489575 9.489575 9.489575 ZT12-15 0 0 0 ZT16-19 11.99485 11.99485 11.99485 ZT20-23 10.148679999999999 10.148679999999999 10.148679999999999