condition mean min max ZT0-3 0.096359 0.0 0.1910245 ZT4-7 0.2842955 0.2842955 0.2842955 ZT8-11 1.34666 1.34666 1.34666 ZT12-15 0.96264225 0.676755 1.2485295 ZT16-19 0.7482850000000001 0.7482850000000001 0.7482850000000001 ZT20-23 0.4258875 0.4258875 0.4258875