condition mean min max ZT0-3 11.686513 11.686513 11.686513 ZT4-7 11.276644000000001 11.276644000000001 11.276644000000001 ZT8-11 10.027356000000001 10.027356000000001 10.027356000000001 ZT12-15 10.422282500000001 10.422282500000001 10.422282500000001 ZT16-19 10.9794855 10.9794855 10.9794855 ZT20-23 11.096388 11.096388 11.096388