46.5% of all registered voters in a country are registered democrats. Is this a parameter or a statistic?

• A. Parameter
• B. Statistic

Answer: (A)

Verified step by step guidance

1. Understand the difference between a parameter and a statistic: A parameter is a numerical value that describes a characteristic of a population, while a statistic is a numerical value that describes a characteristic of a sample.
2. Identify the population in the problem: The problem states 'all registered voters in a country,' which indicates that the entire population of registered voters is being considered.
3. Determine what the 46.5% represents: Since the percentage is describing a characteristic of the entire population of registered voters (i.e., the proportion of registered democrats), it is a parameter.
4. Recognize that if the percentage were based on a sample of registered voters rather than the entire population, it would be considered a statistic.
5. Conclude that because the 46.5% is based on the entire population of registered voters, it is a parameter, not a statistic.