condition mean min max ZT0-3 61.564499999999995 61.564499999999995 61.564499999999995 ZT4-7 59.36175 59.36175 59.36175 ZT8-11 66.84440000000001 66.84440000000001 66.84440000000001 ZT12-15 59.785 59.785 59.785 ZT16-19 61.91745 61.91745 61.91745 ZT20-23 62.48735 62.48735 62.48735