condition mean min max ZT0-3 86.733925 79.91560000000001 93.55225 ZT4-7 42.84465 42.84465 42.84465 ZT8-11 37.595749999999995 37.595749999999995 37.595749999999995 ZT12-15 0 0 0 ZT16-19 36.1783 36.1783 36.1783 ZT20-23 53.7792 53.7792 53.7792