condition mean min max ZT0-3 9.298603333333332 4.455254999999999 13.64785 ZT4-7 6.283995 6.283995 6.283995 ZT8-11 4.959465 4.959465 4.959465 ZT12-15 4.3088049999999996 3.704555 4.913055 ZT16-19 9.196285 9.196285 9.196285 ZT20-23 11.049150000000001 11.049150000000001 11.049150000000001