Algebra 1 Honors End-of-Course (EOC) Practice Test

Range measures how far the data spread from the smallest value to the largest value. To compute it, subtract the smallest value from the largest value in the data set. This simple subtraction captures the overall spread across the entire data set, which matches the idea of the difference between greatest and least values. Other options describe different concepts: subtracting mean and median mixes central tendencies, not spread; the interquartile range (Q3 minus Q1) focuses on the middle half of the data; the standard deviation measures spread by looking at how far each value is from the mean. Therefore, range is the difference between the largest and smallest values.