condition mean min max ZT0-3 47.126596324999994 42.331123739999995 51.92206891 ZT4-7 24.9071698775 24.444564319999998 25.369775435 ZT8-11 54.50218908 36.600548515 72.403829645 ZT12-15 150.940066065 141.87909123 160.00104089999996 ZT16-19 176.86218582499998 157.52770995 196.1966617 ZT20-23 115.64385084999999 109.40229334999998 121.88540835