STATS Flashcards
standard error
expressed in SD units. SD of the sampling distribution of the sampling distribution of a statistic. The term may also be used to refer to an estimate of that SD derived from a particular sample used to compute the estimate
criterion contamination
when the rating given on the criterion is affected by knowledge of the score on the predictor
sampling error
incurred when the statistical characteristics of a population are estimated from a subtest or a sample of that population
systematic error
are biases in measurement which lead to the situation where the mean of many separate measurements differs significantly from the actual value of the measured attribute
standard error of the mean
increases when the SD of a population increases and the sample size decreases, can refer to measurement of SD
Range 0-sdx (sd of test)
differential prediction
members of one group obtain lower scores on the test than measures in another group; however difference is not reflected by measures of their job performance
face validity
superficially looks like test measures what says it does
TYPE I TYPE II NULL
TYPE I- false positive
TYPE II- false negative
Null- samples not equal
shrinkage
when a predictor test is developed by testing a pool of items on a validation sample, and then doesn’t work with another sample
ANOVA vs t test
reduce type i error
criterion based score
how well someone did, has a cut off, percentage
Expected freq in chi square cell
rxc/N
Chi square
independence of observations
kappa coefficient (k)
interrater reliability
History
Coincidentally event not part of treatment, which influences outcome. ABAB
