condition mean min max ZT0-3 102.914829 102.914829 102.914829 ZT4-7 94.893844 94.893844 94.893844 ZT8-11 90.16928300000001 90.16928300000001 90.16928300000001 ZT12-15 89.66431499999999 89.66431499999999 89.66431499999999 ZT16-19 67.330084 67.330084 67.330084 ZT20-23 83.578532 83.578532 83.578532