condition mean min max ZT0-3 4.1190675 3.450285 4.787850000000001 ZT4-7 5.55413 5.55413 5.55413 ZT8-11 10.673670000000001 10.673670000000001 10.673670000000001 ZT12-15 0 0 0 ZT16-19 10.55977 10.55977 10.55977 ZT20-23 7.9009599999999995 7.9009599999999995 7.9009599999999995