condition mean min max ZT0-3 18.2224 18.2224 18.2224 ZT4-7 17.366947 17.366947 17.366947 ZT8-11 24.455226000000003 24.455226000000003 24.455226000000003 ZT12-15 21.765665499999997 21.765665499999997 21.765665499999997 ZT16-19 27.357693499999996 27.357693499999996 27.357693499999996 ZT20-23 24.221237000000002 24.221237000000002 24.221237000000002