condition mean min max ZT0-3 0.69571225 0.614773 0.7766515 ZT4-7 0.7490765 0.7490765 0.7490765 ZT8-11 0.5943295 0.5943295 0.5943295 ZT12-15 0 0 0 ZT16-19 1.2828650000000001 1.2828650000000001 1.2828650000000001 ZT20-23 0.88968 0.88968 0.88968