condition mean min max ZT0-3 0.021960749999999998 0.0 0.03401575 ZT4-7 0.0323787 0.0323787 0.0323787 ZT8-11 0.0 0.0 0.0 ZT12-15 0.032406124999999994 0.0320052 0.03280705 ZT16-19 0.0317863 0.0317863 0.0317863 ZT20-23 0.0 0.0 0.0