condition mean min max ZT0-3 23.086150000000004 23.086150000000004 23.086150000000004 ZT4-7 20.8458 20.8458 20.8458 ZT8-11 16.05135 16.05135 16.05135 ZT12-15 22.268749999999997 22.268749999999997 22.268749999999997 ZT16-19 26.6691 26.6691 26.6691 ZT20-23 25.245600000000003 25.245600000000003 25.245600000000003