A subtest T-score of 50 on an intellectual ability measure indicates what about the distribution?

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Multiple Choice

A subtest T-score of 50 on an intellectual ability measure indicates what about the distribution?

Explanation:
T-scores are standardized so that the average performance sits at 50 and the spread is 10 points. A T-score of 50 places the person exactly at the normative mean, meaning their performance is average compared to peers. It shows location within the distribution, not the amount of variability—that’s the role of the standard deviation (which is 10 for T-scores). For reference, a score of 60 would be one standard deviation above the mean, and 40 would be one below. While median and mode can equal the mean in a perfectly symmetric distribution, the T-score system specifically anchors to the mean, so a value of 50 indicates average performance relative to the group.

T-scores are standardized so that the average performance sits at 50 and the spread is 10 points. A T-score of 50 places the person exactly at the normative mean, meaning their performance is average compared to peers. It shows location within the distribution, not the amount of variability—that’s the role of the standard deviation (which is 10 for T-scores). For reference, a score of 60 would be one standard deviation above the mean, and 40 would be one below. While median and mode can equal the mean in a perfectly symmetric distribution, the T-score system specifically anchors to the mean, so a value of 50 indicates average performance relative to the group.

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