condition mean min max ZT0-3 123.430839 123.430839 123.430839 ZT4-7 115.3117145 115.3117145 115.3117145 ZT8-11 143.5923025 143.5923025 143.5923025 ZT12-15 180.395747 180.395747 180.395747 ZT16-19 139.4241935 139.4241935 139.4241935 ZT20-23 80.5720595 80.5720595 80.5720595