condition mean min max ZT0-3 53.344825 53.16865 53.521 ZT4-7 52.992900000000006 52.992900000000006 52.992900000000006 ZT8-11 39.08 39.08 39.08 ZT12-15 0 0 0 ZT16-19 36.88235 36.88235 36.88235 ZT20-23 56.44855 56.44855 56.44855