Which statistic represents the arithmetic average of all scores?

Which statistic represents the arithmetic average of all scores?

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

Answer: (B)

The mean is the statistic that represents the arithmetic average of all scores. It’s found by adding every score together and dividing by the number of scores. Because it incorporates every data point, it gives a sense of overall performance, but it can be influenced by extreme high or low scores. This differs from the median, which is the middle value when the scores are arranged in order and can be unaffected by outliers. It also isn’t a percentile, which indicates how a score compares relative to others in the group, nor is it a Grade Equivalent Score, which ties performance to a grade level rather than averaging all scores. So the arithmetic average is best described by the mean.

The mean is the statistic that represents the arithmetic average of all scores. It’s found by adding every score together and dividing by the number of scores. Because it incorporates every data point, it gives a sense of overall performance, but it can be influenced by extreme high or low scores. This differs from the median, which is the middle value when the scores are arranged in order and can be unaffected by outliers. It also isn’t a percentile, which indicates how a score compares relative to others in the group, nor is it a Grade Equivalent Score, which ties performance to a grade level rather than averaging all scores. So the arithmetic average is best described by the mean.