Which of the following statements about sequence and itemset is true? (Pick the best answer)frequent sequence contains frequent itemsetfrequent sequence can contain another frequent sequence infrequent sequence contains frequent itemset All of the aboveBoth of the first and the second statements are true
Question
Which of the following statements about sequence and itemset is true? (Pick the best answer)frequent sequence contains frequent itemsetfrequent sequence can contain another frequent sequence infrequent sequence contains frequent itemset All of the aboveBoth of the first and the second statements are true
Solution
The best answer is "Both of the first and the second statements are true".
Here's why:
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A frequent sequence contains a frequent itemset: This is true because a frequent sequence is a list of items that appear together frequently in the dataset. This list of items is also an itemset. If the sequence is frequent, it means the itemset is also frequent.
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A frequent sequence can contain another frequent sequence: This is also true. For example, if the sequence {A, B, C} is frequent, it can contain another frequent sequence like {A, B} or {B, C}.
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An infrequent sequence contains a frequent itemset: This is not necessarily true. An infrequent sequence is a sequence that does not appear frequently in the dataset. It may or may not contain a frequent itemset.
So, the best answer is "Both of the first and the second statements are true".
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Which of the following statement is true? (Pick the best answer)sequence <B F K C> can involve more than 4 itemsitemset {B, F, K, C} can have more than 4 itemsAll of the aboveNone of the above
What is the relation between a candidate and frequent itemsets?Question 26Answera.A frequent itemset must be a candidate itemsetb.Strong relationship with transactionsc.No relation between these twod.A candidate itemset is always a frequent itemset
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