Agreement study (n = 20) from Gwet (2014), p. 125. This data set contains
missing ratings.
A n times R matrix. There are n = 20 row corresponding to the
different items. Each of the R = 5 columns contains the ratings of
the jth judge.
Source
Gwet, K. L. (2014). Handbook of Inter-Rater Reliability.
Advanced Analytics, LLC.