Which statistic is the middle value when all scores are arranged from lowest to highest?

Which statistic is the middle value when all scores are arranged from lowest to highest?

• A. Median
• B. Mean
• C. Grade Equivalent Score
• D. Percentile

Answer: (A)

When data are lined up from smallest to largest, the value right in the middle is the median. It marks the point that divides the set into two equal halves. If there’s an odd number of scores, there’s a single middle value. If there’s an even number, the median is the average of the two central values. The median is useful because it shows the center of the data without being too affected by extremely high or low scores, unlike the mean. The other options describe different ideas: a Grade Equivalent Score compares performance to a grade level, and a Percentile shows how a score compares to the rest of the distribution rather than identifying the central value. For an ordered list, the middle value is the median. For example, with 1, 3, 7, 9, 12, the middle is 7; with 1, 3, 7, 9, the median is the average of 3 and 7, which is 5.

When data are lined up from smallest to largest, the value right in the middle is the median. It marks the point that divides the set into two equal halves. If there’s an odd number of scores, there’s a single middle value. If there’s an even number, the median is the average of the two central values. The median is useful because it shows the center of the data without being too affected by extremely high or low scores, unlike the mean. The other options describe different ideas: a Grade Equivalent Score compares performance to a grade level, and a Percentile shows how a score compares to the rest of the distribution rather than identifying the central value. For an ordered list, the middle value is the median. For example, with 1, 3, 7, 9, 12, the middle is 7; with 1, 3, 7, 9, the median is the average of 3 and 7, which is 5.