Advanced Business Analytics DSA 8590 Questions and Answers

Advanced Business Analytics DSA 8590

Which type of chart would you use to visualize the relationship between two variables?
a) Histogram
b) Scatterplot
c)Box plot
d)Scatterplot Matrix - answerb)Correct! Scatterplot

Which of the following would NOT fall under business analytics?
a)analyzing data
b)collecting data
c)interpreting information
d)acting on information - answerd)Correct! acting on information

Employees' gender is stored in the form of F or M in the payroll data, but is stored in the
form of Female or Male in human resource data. These different ways to store the same
value lead to ____ in data?
a)Noise
b)Incompleteness
c)Error
d)Inconsistency - answerd)Correct! Inconsistency

Which type of chart would you use to visualize the comparison on a single variable
across several groups.?
a)Scatterplot Matrix
b)Correct Answer Box Plot
c) Histogram
d)Scatterplot - answerb)Correct Answer Box Plot

Which type of chart would you use to visualize the distribution of a single variable?
a)Scatterplot
b)Scatterplot Matrix
c)Box Plot
d)Histogram - answerc)Correct! Box Plot

Which of the following statement is correct?
-Lift is used to measure how likely two item sets co-occur by pure chance
-Conf(X->Y) may equal to Conf(Y->X)
-With 5 items, there will be 16 potential item sets
-Confidence is needed to calculate support - answerConf(X->Y) may equal to Conf(Y-
>X)

, Here is a dataset of 6 transactions.
Transaction No.Items Purchased
1: Juice, Bread, Butter, Ice Cream
2:Cereal, Juice, Milk
3:Bread, Cereal, Ice Cream, Milk
4: Bread, Butter, Cereal, Cheese, Juice
5: Bread, Ice Cream, Juice
6:Bread, Cheese, Juice, Milk

a) What is the support percentage of the association rule {Ice Cream} -> {Juice}?
(Rounding to one decimal place)
b) What is the confidence of the association rule {Ice Cream} -> {Juice}? (Rounding to
one decimal place)
c) What is the Lift of the association rule {Ice Cream} -> {Juice}? (Rounding to one
decimal place) - answera)0.3
b)0.7
c)0.8

Which of the following statements about clustering analysis is NOT correct?
-Clustering analysis organizes data points/objects into homogeneous and pre-defined
groups
-We want clustering results to have high intra-similarity
-We want clustering results to have low inter-similarity
-Clustering analysis is a type of exploratory data analytics as clusters come from data -
answerClustering analysis organizes data points/objects into homogeneous and pre-
defined groups

If your data is numeric, which of the following distance metrics is NOT applicable?
-Matching Distance
-Euclidean Distance
-Manhattan Distance
-Max-Coordinate Distance - answerMatching Distance

Suppose you apply hierarchical clustering on 7 data points {A, B, C, D, E, F, G} and
obtain the following dendrogram.

Based on the 3-cluster solution, which of the following statements about the
dendrogram is correct?
-E, F, and G belong to the same cluster
-A, B, C, and D belong to the same cluster
-C, D and E belong to the same cluster
-C, F and G belong to the same cluster - answerE, F, and G belong to the same cluster

Consider the following dataset, which shows the results of 4 medical tests done for 3
different patients (1 - positive test result, 0 - negative test result). What is the Jaccard
Distance between A and C? (Rounding to one decimal place)