condition mean min max ZT0-3 53.6997 53.6997 53.6997 ZT4-7 61.8238 61.8238 61.8238 ZT8-11 30.462600000000002 30.462600000000002 30.462600000000002 ZT12-15 21.6435 21.6435 21.6435 ZT16-19 25.741 25.741 25.741 ZT20-23 42.0794 42.0794 42.0794