condition mean min max ZT0-3 69.65704764750001 69.08091349 70.233181805 ZT4-7 61.02585852 58.41106909 63.64064795 ZT8-11 51.17274792833334 47.94293467666667 54.40256118 ZT12-15 66.790880475 59.55008028 74.03168067 ZT16-19 58.20837734 55.10673571333333 61.31001896666666 ZT20-23 60.780722911666665 59.12171026 62.43973556333333