It tells you approximately how far on the average a score are from the mean.Select one:a.standard deviationb.rangec.moded.Cohen's d

Break Down the Problem

1. Identify the terms related to statistical measures of dispersion and their meanings.
2. Determine which option correctly describes the average distance of scores from the mean.

Relevant Concepts

• Standard Deviation: A measure that indicates the extent to which individual data points differ from the mean of the dataset. It is a key concept in statistics.
• Range: The difference between the maximum and minimum values in a dataset. It does not provide information about how scores are distributed around the mean.
• Mode: The value that appears most frequently in a dataset. It does not indicate the distance of scores from the mean.
• Cohen's d: A measure of effect size, used to indicate the standardized difference between two means. It does not provide average distance from the mean.

Analysis and Detail

• The standard deviation quantifies how much scores vary from the average score, making it the most relevant option in this context.
• The other options do not provide a measure of average distance from the mean.

Verify and Summarize

By analyzing the definitions and functions of each statistical term:

• Standard deviation is the correct choice, as it specifically measures the variability or spread of scores in relation to the mean.

Final Answer

The answer is a. standard deviation.