DATABASE FUNDAMENTALS
DATA WAREHOUSING AND DATA MINING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Absolute-Minimum support count threshold and Relative-Minimum support
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Absolute-Minimum support threshold and Relative-Minimum support count
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threshold
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Both mean same
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Detailed explanation-1: -Support of an Item Set Then the absolute support (or simply the support) of the item set S is the number of transactions in T that contain S. Likewise, the relative support of S is the fraction (or percentage) of the transactions in T which contain S. is the relative support of S.
Detailed explanation-2: -Relative is always in proportion to a whole. Absolute is the total of all existence.
Detailed explanation-3: -The minimum support and minimum confidence are set by the users, and are parameters of the Apriori algorithm for association rule generation. These parameters are used to exclude rules in the result that have a support or a confidence lower than the minimum support and minimum confidence respectively.
Detailed explanation-4: -A frequent itemset is a collection of items that have a higher frequency of occurrence compared to the threshold value specified in the transaction. This value is also known as the minimum support.