condition mean min max ZT0-3 64.9209 64.9209 64.9209 ZT4-7 48.9417 48.9417 48.9417 ZT8-11 18.2638 18.2638 18.2638 ZT12-15 18.81095 18.81095 18.81095 ZT16-19 34.5628 34.5628 34.5628 ZT20-23 56.2132 56.2132 56.2132