condition mean min max ZT0-3 5.650992175000001 5.580409533 5.7215748170000005 ZT4-7 6.966848578 5.8905361355 8.0431610205 ZT8-11 5.0831882095 4.801876706 5.364499713000001 ZT12-15 1.0991529089999998 0.33423784199999995 1.8640679759999998 ZT16-19 0.15255787275 0.1095353695 0.195580376 ZT20-23 1.328594836 0.344275716 2.312913956