condition mean min max ZT0-3 136.477436345 107.07553149 165.87934119999997 ZT4-7 21.419408492499997 16.635199285 26.2036177 ZT8-11 30.525988975 22.03610193 39.01587602 ZT12-15 33.009672105 26.943113235 39.076230975 ZT16-19 32.6853131325 29.156951475 36.21367479 ZT20-23 46.343844715 45.5829941 47.10469533