condition mean min max ZT0-3 10.784215905 10.28827892 11.28015289 ZT4-7 30.383195655 23.700573375 37.065817935 ZT8-11 45.2720810675 42.789639075 47.75452306 ZT12-15 95.84548740499999 79.28889706999999 112.40207773999998 ZT16-19 118.6234335 110.69809715000001 126.54876985000001 ZT20-23 97.85853997499999 97.016263575 98.70081637499999