condition mean min max ZT0-3 48.59836666666667 44.46315 53.099000000000004 ZT4-7 42.4629 42.4629 42.4629 ZT8-11 32.2053 32.2053 32.2053 ZT12-15 40.58455 37.9209 43.2482 ZT16-19 39.054950000000005 39.054950000000005 39.054950000000005 ZT20-23 47.050749999999994 47.050749999999994 47.050749999999994