condition mean min max ZT0-3 2509.400937 2509.400937 2509.400937 ZT4-7 3741.160511 3741.160511 3741.160511 ZT8-11 3095.8759605 3095.8759605 3095.8759605 ZT12-15 2768.8390795 2768.8390795 2768.8390795 ZT16-19 3002.4285005 3002.4285005 3002.4285005 ZT20-23 2618.128782 2618.128782 2618.128782