condition mean min max ZT0-3 0.35687925 0.2600865 0.453672 ZT4-7 0.728086 0.728086 0.728086 ZT8-11 0.5500050000000001 0.5500050000000001 0.5500050000000001 ZT12-15 0 0 0 ZT16-19 0.3424605 0.3424605 0.3424605 ZT20-23 0.484947 0.484947 0.484947