condition mean min max ZT0-3 0.9534365 0.9534365 0.9534365 ZT4-7 0.7929645000000001 0.7929645000000001 0.7929645000000001 ZT8-11 1.068761 1.068761 1.068761 ZT12-15 2.0938499999999998 2.0938499999999998 2.0938499999999998 ZT16-19 1.962625 1.962625 1.962625 ZT20-23 1.18424 1.18424 1.18424