Association: Association [3] try to find out how various
attributes of a database are related to each other. Apriori
algorithm [3] is one of the famous association algorithms. It
requires two values, support and confidence to find interesting
patterns. Association algorithms are not evaluated based on
Clustering: It is an unsupervised learning technique in which classes (output) are unknown [3]. It works by finding the similarities/distance between two objects. If the similarity/distance measure is within the threshold value, objects will belong to same class, otherwise not. The objects that belong to same class will together form a cluster; hence this technique is named as clustering. K-means algorithm [5] is a very famous clustering algorithm which results in k clusters.