condition mean min max ZT0-3 14.13215 14.13215 14.13215 ZT4-7 13.2495 13.2495 13.2495 ZT8-11 13.21345 13.21345 13.21345 ZT12-15 12.92725 12.92725 12.92725 ZT16-19 13.3076 13.3076 13.3076 ZT20-23 11.8718 11.8718 11.8718