condition mean min max ZT0-3 370.398851 370.398851 370.398851 ZT4-7 417.79343300000005 417.79343300000005 417.79343300000005 ZT8-11 382.585244 382.585244 382.585244 ZT12-15 406.462826 406.462826 406.462826 ZT16-19 418.090956 418.090956 418.090956 ZT20-23 440.6922435 440.6922435 440.6922435