T-score is used when you don't have the population standard deviation and must use the sample standard deviation as a substitute.
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If the sample size is less then 30 use the T table, if greater then 30 use the Z table.
T score is usually used when the sample size is below 30 and/or when the population standard deviation is unknown.
Yes. It's the past tense of the verb to score.
T score was originally given to a type of normalized score based on a group of unselected pre-adolescents. Notwithstanding, it has come to refer to any normally distributed standard scores that has a mean of 50 and a standard deviation of 10. L F C
A credit score is a credit evaluation rating. The British use score to mean the number twenty, as well.