condition mean min max ZT0-3 277.84516666666667 235.1415 302.804 ZT4-7 124.97 124.97 124.97 ZT8-11 42.63655 42.63655 42.63655 ZT12-15 236.016 192.039 279.993 ZT16-19 208.263 208.263 208.263 ZT20-23 303.019 303.019 303.019