condition mean min max ZT0-3 0.1568695 0.076636 0.235378 ZT4-7 0.44975299999999996 0.44975299999999996 0.44975299999999996 ZT8-11 0.461982 0.461982 0.461982 ZT12-15 1.25475125 0.9825925 1.52691 ZT16-19 0.802809 0.802809 0.802809 ZT20-23 0.494812 0.494812 0.494812