condition mean min max ZT0-3 0.3855575 0.3060085 0.4651065 ZT4-7 0.5396295 0.5396295 0.5396295 ZT8-11 1.0837999999999999 1.0837999999999999 1.0837999999999999 ZT12-15 0 0 0 ZT16-19 0.991242 0.991242 0.991242 ZT20-23 1.0717405 1.0717405 1.0717405