condition mean min max ZT0-3 175.555 175.555 175.555 ZT4-7 159.5115 159.5115 159.5115 ZT8-11 116.2205 116.2205 116.2205 ZT12-15 116.20400000000001 116.20400000000001 116.20400000000001 ZT16-19 137.36166666666665 137.36166666666665 137.36166666666665 ZT20-23 220.773 220.773 220.773