condition mean min max ZT0-3 57.433775 56.16395 58.703599999999994 ZT4-7 83.88355 83.88355 83.88355 ZT8-11 61.030699999999996 61.030699999999996 61.030699999999996 ZT12-15 0 0 0 ZT16-19 59.8826 59.8826 59.8826 ZT20-23 74.48304999999999 74.48304999999999 74.48304999999999