condition mean min max ZT0-3 140.86473 140.86473 140.86473 ZT4-7 348.3750025 348.3750025 348.3750025 ZT8-11 413.9846385 413.9846385 413.9846385 ZT12-15 290.1758385 290.1758385 290.1758385 ZT16-19 231.33126700000003 231.33126700000003 231.33126700000003 ZT20-23 264.058537 264.058537 264.058537