In General,approximately What Percentage of Scores Would Be Expected to Fall

question 50

Multiple Choice

In general,approximately what percentage of scores would be expected to fall within two standard deviations above or below the standard error of measurement of the "true score" on a test?

• A) 85%
• B) 90%
• C) 95%
• D) 99%

---

Definitions:

Confidence Interval

A collection of numbers, sourced from sample data, presumed to contain the value of an undiscovered population characteristic.

Population Variance

The variance of a population data set, calculating the mean of the squared deviations from the mean of the data.

Confidence Interval

A range of values, derived from the sample data, that is likely to contain the value of an unknown population parameter.

Sample Variance

A measure of variability that quantifies the spread of a sample data set; calculated as the sum of squared deviations from the sample mean, divided by the sample size minus one.