A normal score with a mean of 50 and a standard deviation of 10 is called a...

A normal score with a mean of 50 and a standard deviation of 10 is called a...

• A. T-Score
• B. Z-Score
• C. IQ-Score
• D. Standard Score

Answer: (A)

Standardizing scores uses a fixed mean and standard deviation so results can be compared across tests. When the fixed mean is 50 and the standard deviation is 10, that specific standard score is called a T-score. This naming helps interpret the distance from the mean in familiar units: a score of 60 is one standard deviation above the mean, and 40 is one standard deviation below. Z-scores, by contrast, have a mean of 0 and an SD of 1, IQ scores typically have a mean of 100 and SD of 15, and “standard score” is a general term that can refer to different scales depending on the test. Therefore, the score described is the T-score.

Standardizing scores uses a fixed mean and standard deviation so results can be compared across tests. When the fixed mean is 50 and the standard deviation is 10, that specific standard score is called a T-score. This naming helps interpret the distance from the mean in familiar units: a score of 60 is one standard deviation above the mean, and 40 is one standard deviation below. Z-scores, by contrast, have a mean of 0 and an SD of 1, IQ scores typically have a mean of 100 and SD of 15, and “standard score” is a general term that can refer to different scales depending on the test. Therefore, the score described is the T-score.