American Institute of Certified Planners (AICP) Practice Exam

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What does the range of a dataset indicate?

The average of the scores
The difference between the highest and lowest score
The measure of how spread out the scores are
The most frequently occurring score

The correct answer is: The difference between the highest and lowest score

The range of a dataset is a fundamental statistical measure that indicates the difference between the highest and lowest scores within that dataset. It provides a simple way to understand the extent of variation present—essentially quantifying how spread out the values are from one extreme to the other. By calculating the range, you gain insight into the breadth of the dataset, which can be particularly useful in identifying outliers or assessing the overall variability. This metric does not provide information about the central tendencies (like averages) or the frequency of occurrence of values, which sets it apart from the other options. Understanding the range helps in evaluating the distribution characteristics, making it an essential concept in statistics.