condition mean min max ZT0-3 32.797250000000005 32.797250000000005 32.797250000000005 ZT4-7 28.682299999999998 28.682299999999998 28.682299999999998 ZT8-11 21.81965 21.81965 21.81965 ZT12-15 23.077849999999998 23.077849999999998 23.077849999999998 ZT16-19 30.859499999999997 30.859499999999997 30.859499999999997 ZT20-23 31.443649999999998 31.443649999999998 31.443649999999998