condition mean min max ZT0-3 76.362817 76.362817 76.362817 ZT4-7 82.865166 82.865166 82.865166 ZT8-11 80.8169685 80.8169685 80.8169685 ZT12-15 75.711784 75.711784 75.711784 ZT16-19 79.000981 79.000981 79.000981 ZT20-23 60.448418000000004 60.448418000000004 60.448418000000004