Assertion (A): The level of difficulty of a test item should be adaptable to the level of understanding of the examinees
Reason (R): The exact decision regarding the difficulty value of an item can be taken only after some statistical techniques have been applied

A. Raw data B. Ungrouped data C. Either A or B D. None of the above

A. Geometric mean B. Arithmetic mean C. Median D. None of the above

A. Parallel-forms reliability B. Equivalent forms reliability C. Comparable forms reliability D. All of the above

A. Case histories B. Tests C. Surveys D. None of the above