unitfreq

The unit for the estimated frequencies, relative frequencies, and corresponding standard errors of the multiple-choice selections selections . For example in distfreq.txt, the frequencies are placed in distfreq.csv. In the case of the initial item, there are two item scores 0 and 1. For the item score 0, there are 1,478 examinees. Of these examinees, 8 selected the first distractor category 0, so that the fraction of examinees with item score 0 with this distractor selection is 8/1478=0.00541.