  Unsupervised Machine Learning Paradigms are often the only methodology to
rely on, given a Pattern Recognition Task with no target label or annotations
being present. In such scenarios, data preparation is a crucial step to be
performed so that the Unsupervised Paradigms work with as much perfection as
possible. But, when there is no sufficient or missing data being present in
each and every instance of a dataset, data preparation becomes a challenge
itself. One such case-study is the Jester Dataset that has missing values which
are basically ratings given by Joke-Readers to a specified set of 100 jokes. In
order to perform a Cluster Analysis on such a dataset, the data preparation
step should involve filling the missing ratings with appropriate values
followed by cluster analysis using an Unsupervised ML Paradigm. In this study,
the most recent and probably the only work that involves Cluster Analysis on
the Jester Dataset of Jokes is reviewed and validated with corrections and
future scope.
