Observed test scores
3 important questions on Observed test scores
What do we mean by the weighted test score of a test taker?
- some items differ in importance.
- so weight is assigned to different items to make them count more.
What is the formula for the weighted test score?
What do the correlation and the covariance say about the items?
- correlation and covariance are measures of association
- when you find high correlation/covariance it is likely that the items measure the same construct
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