Question
This clustering approach initially assumes that each data instance represents a single cluster.
Select one:
a. expectation maximization
b. K-Means clustering
c. agglomerative clustering
d. conceptual clustering
The correct answer is:agglomerative clustering
Question
The correlation coefficient for two real-valued attributes is –0.85. What does this value tell you?
Select one:
a. The attributes are not linearly related.
b. As the value of one attribute decreases the value of the second attribute increases.
c. As the value of one attribute increases the value of the second attribute also increases.
d. The attributes show a linear relationship
The correct answer is: As the value of one attribute decreases the value of the second attribute increases.
Question
Time Complexity of k-means is given by
Select one:
a. O(mn)
b. O(tkn)
c. O(kn)
d. O(t2kn)
The correct answer is: O(tkn)
Question
Given a rule of the form IF X THEN Y, rule confidence is defined as the conditional probability that
Select one:
a. Y is false when X is known to be false.
b. Y is true when X is known to be true.
c. X is true when Y is known to be true
d. X is false when Y is known to be false.
The correct answer is: Y is true when X is known to be true.