condition mean min max ZT0-3 1051.218022 1051.218022 1051.218022 ZT4-7 1194.4142375 1194.4142375 1194.4142375 ZT8-11 1149.554741 1149.554741 1149.554741 ZT12-15 1224.012173 1224.012173 1224.012173 ZT16-19 884.3416665 884.3416665 884.3416665 ZT20-23 726.400003 726.400003 726.400003