View source: R/mean_identified_function.R
mean_identified | R Documentation |
This function calculates the expected value (mean) of the ability true score distribution for identified students.
mean_identified( relyt = 1, test.cutoff, valid = 1e-07, nom.cutoff = 1e-07, mu = 0 )
relyt |
Confirmatory test reliability coefficient. Range (0, 1].
Must not be exactly 0. Defaults to 1; in this case, x is assumed
to be an observed score. If an alternative value is supplied for
|
test.cutoff |
Confirmatory test cutoff percentile. Range (0, 1). Must not be exactly 0 or 1. |
valid |
Nomination validity coefficient. Controls the relatedness of the nomination scores and the confirmatory test scores. Range (0, 1). Must not be exactly 0 or 1, and must be less than the square root of the test reliability. Defaults to 1e-7 for a single- stage identification system. |
nom.cutoff |
Nomination cutoff percentile. Range (0, 1). Must not be exactly 0 or 1. Defaults to 1e-7 for a single- stage identification system. |
mu |
Population mean true score on a standardized (z-score) metric. Defaults to zero. |
# mean true score for identified students mean_identified( relyt = .9, valid = .8, test.cutoff = .9, nom.cutoff = .5 ) # mean observed score for identified students mean_identified( valid = .8, test.cutoff = .9, nom.cutoff = .5 )
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