(ETS) Educational Testing Service Practice Test
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(ETS) Educational Testing Service Practice Test
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ETS K-12 and Educational Assessments 3
Free ยท Instant Results
Which statistical measure is used most commonly to describe the difficulty of an individual test item in classical test theory?
A
Point-biserial correlation
B
Item difficulty index (p-value)
C
Cronbach's alpha
D
Standard error of measurement
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