condition mean min max ZT0-3 65.0192031075 62.422131565 67.61627465 ZT4-7 51.8688872225 51.453885 52.283889445 ZT8-11 150.380899975 106.7652389 193.99656105 ZT12-15 310.7933131 265.29776915 356.28885705 ZT16-19 350.38055884999994 339.04024984999995 361.72086785 ZT20-23 259.39136384999995 231.37067989999997 287.4120478