condition mean min max ZT0-3 44.501450865833334 40.964602655 48.03829907666667 ZT4-7 55.925608225 52.832976099999996 59.01824035 ZT8-11 71.62725887 71.42148172 71.83303602000001 ZT12-15 71.587726705 70.33844973 72.83700368 ZT16-19 58.726341505 56.99439889666667 60.458284113333335 ZT20-23 48.975994588333336 47.34343554 50.60855363666666