condition mean min max ZT0-3 42.5031 39.99615 45.01005 ZT4-7 59.9017 59.9017 59.9017 ZT8-11 66.32294999999999 66.32294999999999 66.32294999999999 ZT12-15 0 0 0 ZT16-19 61.798500000000004 61.798500000000004 61.798500000000004 ZT20-23 65.38385 65.38385 65.38385