condition mean min max ZT0-3 48.24445 48.24445 48.24445 ZT4-7 38.80185 38.80185 38.80185 ZT8-11 36.234350000000006 36.234350000000006 36.234350000000006 ZT12-15 42.66895 42.66895 42.66895 ZT16-19 54.76349999999999 54.76349999999999 54.76349999999999 ZT20-23 54.85675 54.85675 54.85675