condition mean min max ZT0-3 59.340011 59.340011 59.340011 ZT4-7 57.747228500000006 57.747228500000006 57.747228500000006 ZT8-11 69.756438 69.756438 69.756438 ZT12-15 58.222375 58.222375 58.222375 ZT16-19 80.9762625 80.9762625 80.9762625 ZT20-23 94.2582855 94.2582855 94.2582855