condition mean min max ZT0-3 0.6715835 0.480136 1.0388345 ZT4-7 0.2417585 0.2417585 0.2417585 ZT8-11 0.554011 0.554011 0.554011 ZT12-15 0.78097775 0.679358 0.8825975 ZT16-19 0.42376749999999996 0.42376749999999996 0.42376749999999996 ZT20-23 0.537307 0.537307 0.537307