condition mean min max ZT0-3 12.4646 12.4646 12.4646 ZT4-7 10.5175 10.5175 10.5175 ZT8-11 10.62451 10.62451 10.62451 ZT12-15 13.390799999999999 13.390799999999999 13.390799999999999 ZT16-19 13.1901 13.1901 13.1901 ZT20-23 12.854800000000001 12.854800000000001 12.854800000000001