Final answer:
The unemployment rate does not represent the percentage of all adults in the US who are unemployed.
Step-by-step explanation:
The unemployment rate does not mean that 3.4% of all adults in the US are unemployed. The unemployment rate is defined as the number of unemployed persons as a percentage of the labor force.
The labor force includes only those adults who are either employed or actively looking for work. Therefore, the unemployment rate does not account for adults who are not in the labor force, such as retirees, students, or homemakers.