condition mean min max ZT0-3 12.9706 12.0505 13.890699999999999 ZT4-7 10.475565 10.475565 10.475565 ZT8-11 15.2306 15.2306 15.2306 ZT12-15 0 0 0 ZT16-19 14.89395 14.89395 14.89395 ZT20-23 16.53535 16.53535 16.53535