Final answer:
The statement that is true is d. 24% is the parameter, and 18% is the statistic.
Step-by-step explanation:
The statement that is true is d. 24% is the parameter, and 18% is the statistic.
In statistics, a parameter refers to a characteristic or value of a population, while a statistic refers to a characteristic or value of a sample. In this case, the State of Georgia's statistic is that 24% of all registered vehicles in Georgia are black, which is the parameter of interest. The random sample taken at the grocery store parking lot found that 18% of cars were black, making it the statistic.