condition mean min max ZT0-3 414.376149 414.376149 414.376149 ZT4-7 364.349895 364.349895 364.349895 ZT8-11 329.389773 329.389773 329.389773 ZT12-15 348.04371549999996 348.04371549999996 348.04371549999996 ZT16-19 385.829925 385.829925 385.829925 ZT20-23 413.5012875 413.5012875 413.5012875