condition mean min max ZT0-3 40.007216666666665 38.7822 41.0479 ZT4-7 35.4653 35.4653 35.4653 ZT8-11 35.11175 35.11175 35.11175 ZT12-15 45.98755 44.064949999999996 47.91015 ZT16-19 38.531099999999995 38.531099999999995 38.531099999999995 ZT20-23 40.935050000000004 40.935050000000004 40.935050000000004