condition mean min max ZT0-3 35.720605 35.720605 35.720605 ZT4-7 74.035 74.035 74.035 ZT8-11 136.15488249999999 136.15488249999999 136.15488249999999 ZT12-15 116.5110865 116.5110865 116.5110865 ZT16-19 66.8486335 66.8486335 66.8486335 ZT20-23 33.555691 33.555691 33.555691