In the DoD Exposure Assessment Model, the metric of 'highest number minus lowest number' corresponds to which statistic?

In the DoD Exposure Assessment Model, the metric of 'highest number minus lowest number' corresponds to which statistic?

• A. Range
• B. Mean
• C. Median
• D. Mode

Answer: (A)

The main idea is understanding what the range tells you about a data set. The metric described as the difference between the highest value and the lowest value is the range. It measures how spread out the exposure numbers are—from the smallest to the largest observation. Why this is the best fit: range is specifically a measure of spread or dispersion, not of where the data cluster around a center. It doesn’t require any particular data shape and is simply the distance between the two extremes, which is exactly what “highest minus lowest” computes. To contrast with other statistics: the mean is the average value, a measure of central tendency. The median is the middle value when the data are ordered, another central tendency measure. The mode is the most common value in the dataset. None of these are computed by subtracting the smallest value from the largest, so they don’t describe how wide the data spread is. Keep in mind that while the range gives a quick sense of dispersion, it can be sensitive to outliers and doesn’t describe how the values are distributed between the ends.

The main idea is understanding what the range tells you about a data set. The metric described as the difference between the highest value and the lowest value is the range. It measures how spread out the exposure numbers are—from the smallest to the largest observation.

Why this is the best fit: range is specifically a measure of spread or dispersion, not of where the data cluster around a center. It doesn’t require any particular data shape and is simply the distance between the two extremes, which is exactly what “highest minus lowest” computes.

To contrast with other statistics: the mean is the average value, a measure of central tendency. The median is the middle value when the data are ordered, another central tendency measure. The mode is the most common value in the dataset. None of these are computed by subtracting the smallest value from the largest, so they don’t describe how wide the data spread is.

Keep in mind that while the range gives a quick sense of dispersion, it can be sensitive to outliers and doesn’t describe how the values are distributed between the ends.