Final answer:
The crude birth rate is a general measure of live births, while the total fertility rate provides a more comprehensive measure of fertility in a population.
Step-by-step explanation:
The crude birth rate is considered less refined than the total fertility rate because it provides a more general and basic measurement of the number of live births per 1,000 people per year in a population, without accounting for factors such as age or specific population groups. On the other hand, the total fertility rate takes into account the average number of children a woman is expected to have in her lifetime, providing a more comprehensive measure of fertility in a specific population or region.