condition mean min max ZT0-3 332.080091 332.080091 332.080091 ZT4-7 295.703244 295.703244 295.703244 ZT8-11 302.3013995 302.3013995 302.3013995 ZT12-15 327.599986 327.599986 327.599986 ZT16-19 468.644877 468.644877 468.644877 ZT20-23 408.1805735 408.1805735 408.1805735