condition mean min max ZT0-3 48.602888 48.602888 48.602888 ZT4-7 27.389747999999997 27.389747999999997 27.389747999999997 ZT8-11 43.025082 43.025082 43.025082 ZT12-15 61.3430055 61.3430055 61.3430055 ZT16-19 69.882218 69.882218 69.882218 ZT20-23 76.1695065 76.1695065 76.1695065