Frequent Pattern mining

Given the transaction in Table 1 and minsup s = 50%, how many frequent 3-itemsets are there?

• 0

• 1

• 2

• 3

Considering Apriori Algorithm, assume we have 5 items (A to E) in total. In the 1-st scan, we find out all frequent items A, B, C, and E. How many size-2 (i.e. containing 2 items, e.g. A, B) itemsets should be considered in 2-nd scan, are potential to be size-2 frequent itemsets?

• 3

• 4

• 5

• 6

At Donovan's Donuts, the number of donut holes in a box can vary. Help Donovan find the mode.

12,10,10,10,13,12,11,13,10

• 13

• 12

• 11

• 10

Eli bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Eli's scores?

• 193

• 127

• 60

• 66

Find the mean of these numbers:
5,11,2,12,4,2

• 4.1
• 6
• 4.5
• 4

Find the median of these numbers:
4,2,7,4,3

• 2
• 5
• 7
• 4

Which of the following technique is categorised as unsupervised learning?

• Decision Tree

• Clustering

• None of the above

These are reasons why data are dirty, except ______

• incomplete

• outdated

• garbage in garbage out

• inconsistent