condition mean min max ZT0-3 45.863901 45.863901 45.863901 ZT4-7 43.2814025 43.2814025 43.2814025 ZT8-11 47.412141000000005 47.412141000000005 47.412141000000005 ZT12-15 47.670567000000005 47.670567000000005 47.670567000000005 ZT16-19 62.785329000000004 62.785329000000004 62.785329000000004 ZT20-23 56.7803345 56.7803345 56.7803345