condition mean min max ZT0-3 12.7750025 11.304105 14.245899999999999 ZT4-7 6.304065 6.304065 6.304065 ZT8-11 3.6664399999999997 3.6664399999999997 3.6664399999999997 ZT12-15 0 0 0 ZT16-19 8.419335 8.419335 8.419335 ZT20-23 10.902955 10.902955 10.902955