condition mean min max ZT0-3 0.45836675 0.319947 0.5967865 ZT4-7 0.867252 0.867252 0.867252 ZT8-11 0.4381415 0.4381415 0.4381415 ZT12-15 0 0 0 ZT16-19 0.3197085 0.3197085 0.3197085 ZT20-23 0.6973235 0.6973235 0.6973235