condition mean min max ZT0-3 0.5500335 0.38912599999999997 0.6446959999999999 ZT4-7 0.4497025 0.4497025 0.4497025 ZT8-11 0.5908675 0.5908675 0.5908675 ZT12-15 0.64668675 0.5961425 0.6972309999999999 ZT16-19 0.47992650000000003 0.47992650000000003 0.47992650000000003 ZT20-23 0.655501 0.655501 0.655501