condition mean min max ZT0-3 0.1962695665 0.0 0.392539133 ZT4-7 0.81448560025 0.7388004265 0.890170774 ZT8-11 8.18469093425 3.972409337 12.3969725315 ZT12-15 53.318547565 46.35123186 60.28586327 ZT16-19 30.1141725325 26.854287735 33.37405733 ZT20-23 25.5934634225 22.89428183 28.292645015