condition mean min max ZT0-3 2396.17 2396.17 2396.17 ZT4-7 3624.9300000000003 3624.9300000000003 3624.9300000000003 ZT8-11 5689.875 5689.875 5689.875 ZT12-15 3269.0 3269.0 3269.0 ZT16-19 2883.605 2883.605 2883.605 ZT20-23 1974.6999999999998 1974.6999999999998 1974.6999999999998