condition mean min max ZT0-3 64.060875 63.52355 64.59819999999999 ZT4-7 34.063 34.063 34.063 ZT8-11 11.90335 11.90335 11.90335 ZT12-15 0 0 0 ZT16-19 25.667299999999997 25.667299999999997 25.667299999999997 ZT20-23 42.665949999999995 42.665949999999995 42.665949999999995