condition mean min max ZT0-3 11.761524999999999 11.3387 12.18435 ZT4-7 23.457749999999997 23.457749999999997 23.457749999999997 ZT8-11 51.0928 51.0928 51.0928 ZT12-15 0 0 0 ZT16-19 44.69285 44.69285 44.69285 ZT20-23 31.916400000000003 31.916400000000003 31.916400000000003