condition mean min max ZT0-3 75.47425 75.47425 75.47425 ZT4-7 56.254599999999996 56.254599999999996 56.254599999999996 ZT8-11 52.44555 52.44555 52.44555 ZT12-15 54.75335 54.75335 54.75335 ZT16-19 80.34455 80.34455 80.34455 ZT20-23 75.67215 75.67215 75.67215