Deck 4: Data Analysis and Visualization

Question 1

Which of the following is not a major data analysis approaches?

A)Data Mining
B)Predictive Intelligence
C)Business Intelligence
D)Text Analytics

Answer 1

Predictive Intelligence

Question 2

How many main statistical methodologies are used in data analysis?

A)2
B)3
C)4
D)5

Answer 2

2

Question 3

In descriptive statistics, data from the entire population or a sample is summarized with ?

A)integer descriptors
B)floating descriptors
C)numerical descriptors
D)decimal descriptors

Answer 3

numerical descriptors

Question 4

Data Analysis is defined by the statistician?

A)William S.
B)Hans Peter Luhn
C)Gregory Piatetsky-Shapiro
D)John Tukey

Question 5

Which of the following is true about hypothesis testing?

A)answering yes/no questions about the data
B)estimating numerical characteristics of the data
C)describing associations within the data
D)modeling relationships within the data

Question 6

The goal of business intelligence is to allow easy interpretation of large volumes of data to identify new opportunities.

A)TRUE
B)FALSE
C)Can be true or false
D)Can not say

Question 7

The branch of statistics which deals with development of particular statistical methods is classified as

A)industry statistics
B)economic statistics
C)applied statistics.
D)applied statistics

Question 8

Which of the following is true about regression analysis?

A)answering yes/no questions about the data
B)estimating numerical characteristics of the data
C)modeling relationships within the data
D)describing associations within the data

Question 9

Text Analytics, also referred to as Text Mining?

A)TRUE
B)FALSE
C)Can be true or false
D)Can not say

Question 10

What is true about Data Visualization?

A)Data Visualization is used to communicate information clearly and efficiently to users by the usage of information graphics such as tables and charts.
B)Data Visualization helps users in analyzing a large amount of data in a simpler way.
C)Data Visualization makes complex data more accessible, understandable, and usable.
D)All of the above

Question 11

Data can be visualized using?

A)graphs
B)charts
C)maps
D)All of the above

Question 12

Data visualization is also an element of the broader _____________.

A)deliver presentation architecture
B)data presentation architecture
C)dataset presentation architecture
D)data process architecture

Question 13

Which method shows hierarchical data in a nested format?

A)Treemaps
B)Scatter plots
C)Population pyramids
D)Area charts

Question 14

Which is used to inference for 1 proportion using normal approx?

A)fisher.test()
B)chisq.test()
C)Lm.test()
D)prop.test()

Question 15

Which is used to find the factor congruence coefficients?

A)factor.mosaicplot
B)factor.xyplot
C)factor.congruence
D)factor.cumsum

Question 16

Which of the following is tool for checking normality?

A)qqline()
B)qline()
C)anova()
D)lm()

Question 17

Which of the following is false?

A)data visualization include the ability to absorb information quickly
B)Data visualization is another form of visual art
C)Data visualization decrease the insights and take solwer decisions
D)None Of the above

Question 18

Common use cases for data visualization include?

A)Politics
B)Sales and marketing
C)Healthcare
D)All of the above

Question 19

Which of the following plots are often used for checking randomness in time series?

A)Autocausation
B)Autorank
C)Autocorrelation
D)None of the above

Question 20

To find the minimum or the maximum of a function, we set the gradient to zero because:

A)The value of the gradient at extrema of a function is always zero
B)Depends on the type of problem
C)Both A and B
D)None of the above

Question 21

Which of the following techniques can not be used for normalization in text mining?

A)Stemming
B)Lemmatization
C)Stop Word Removal
D)None of the above

Question 22

In which of the following cases will K-means clustering fail to give good results?
1) Data points with outliers
2) Data points with different densities
3) Data points with nonconvex shapes

A)1 and 2
B)2 and 3
C)1 and 3
D)All of the above

Question 23

Which of the following is a reasonable way to select the number of principal components "k"?

A)Choose k to be the smallest value so that at least 99% of the varinace is retained.
B)Choose k to be 99% of m (k = 0.99*m, rounded to the nearest integer).
C)Choose k to be the largest value so that 99% of the variance is retained.
D)Use the elbow method.

Question 24

Which of the following is false?

A)Subsetting can be used to select and exclude variables and observations
B)Raw data should be processed only one time.
C)Merging concerns combining datasets on the same observations to produce a result with more variables
D)None Of the above

Question 25

According to analysts, for what can traditional IT systems provide a foundation when they're integrated with big data technologies like Hadoop?

A)Big data management and data mining
B)Data warehousing and business intelligence
C)Management of Hadoop clusters
D)Collecting and storing unstructured data

Question 26

________ Programming language is dialect of S.

A)B
B)C
C)R
D)None of the above

Question 27

File containing R scripts end with extension _______.

A).R
B).S
C).bigdata
D)All of the above

Question 28

Which of the following is a subset of machine learning?

A)Numpy
B)SciPy
C)Deep Learning
D)All of the above

Question 29

How many layers Deep learning algorithms are constructed?

A)2
B)3
C)4
D)5