Q.no 51. a model predicts 50 examples belonging to the minority class, 45 of which
are true positives and five of which are false positives. Precision of model is
A : Precision= 0.90
B : Precision= 0.79
C : Precision= 0.45
D : Precision= 0.68
Q.no 52. A sub-database which consists of set of prefix paths in the FP-tree co
occuring with the sufix pattern is called as
A : Suffix path
B : FP-tree
C : Prefix path
D : Condition pattern base
Q.no 53. High entropy means that the partitions in classification are
A : pure
B : Not pure
C : Useful
D : Not useful
Q.no 54. Which of the following sentence is FALSE regarding regression?
A : It relates inputs to outputs.
B : It is used for prediction.
C : It may be used for interpretation.
D : It discovers causal relationships.
Q.no 55. The following represents age distribution of students in an elementary
class. Find the mode of the values: 7, 9, 10, 13, 11, 7, 9, 19, 12, 11, 9, 7, 9, 10, 11.
A : 7
B : 9
C : 10
D : 11
Q.no 56. In one of the frequent itemset example, it is observed that if tea and milk
are bought then sugar is also purchased by customers. After, generating an
association rule among the given set of items, it is inferred:
A : {Tea} is antecedent and {sugar} is consequent
B : {Tea} is antecedent and the itemset {milk, sugar} is consequent
C : The itemset {Tea, milk} is consequent and {sugar} is antecedent
D : The itemset { Tea, milk} is antecedent and {sugar} is consequent
Q.no 57. Correlation analysis is used for
A : handling missing values
B : identifying redundant attributes
C : handling different data formats
D : eliminating noise
Q.no 58. A data normalization technique for real-valued attributes that divides
each numerical value by the same power of 10.
A : min-max normalization
B : z-score normalization
C : decimal scaling
D : decimal smoothing
Q.no 59. Rotating the axes in a 3-D cube is the examplele of
A : Pivot
B : Roll up
C : Drill down
D : Slice
Q.no 60. Holdout method, Cross-validation and Bootstrap methods are techniques
to estimate
A : Precision
B : Classifier performance
C : Recall
D : F-measure
Answer for Question No 51. is a
Answer for Question No 52. is d
Answer for Question No 53. is b
Answer for Question No 54. is d
Answer for Question No 55. is b
Answer for Question No 56. is d
Answer for Question No 57. is b
Answer for Question No 58. is c
Answer for Question No 59. is a
Answer for Question No 60. is b
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