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

Accepted Answer

Predictive Intelligence is not a standalone data analysis approach but rather a component or outcome of utilizing data analysis techniques such as data mining, business intelligence, and text analytics. It involves using data, statistical algorithms, and machine learning techniques to identify the likelihood of future outcomes based on historical data.

Question 2

How many main statistical methodologies are used in data analysis?
A)2
B)3
C)4
D)5

Accepted Answer

The two main statistical methodologies used in data analysis are descriptive statistics and inferential statistics.

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

Accepted Answer

Descriptive statistics summarize data from an entire population or a sample using numerical descriptors, which include measures of central tendency, dispersion, and shape, among others. These descriptors are not limited to integers, floating numbers, or decimals specifically, but can be any form of numerical data.

Question 4

Data Analysis is defined by the statistician?
A)William S.
B)Hans Peter Luhn
C)Gregory Piatetsky-Shapiro
D)John Tukey

Accepted Answer

John Tukey is credited with developing the concept of exploratory data analysis, which is a significant part of what we now refer to as data analysis.

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

Accepted Answer

Hypothesis testing is primarily used for answering yes/no questions about the data, such as whether there is a significant difference between two groups or whether a certain factor has an effect.

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

Accepted Answer

The goal of business intelligence (BI) indeed is to enable easy interpretation of large volumes of data, thereby helping organizations to identify new opportunities, optimize their operations, and make informed business decisions.

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

Accepted Answer

Applied statistics deals with the development of particular statistical methods for specific applications in various fields.

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

Accepted Answer

Regression analysis is a statistical technique used to model relationships within data. It can be used to predict the value of a dependent variable based on the values of one or more independent variables.

Question 9

Text Analytics, also referred to as Text Mining?
A)TRUE
B)FALSE
C)Can be true or false
D)Can not say

Accepted Answer

Text Analytics is indeed also referred to as Text Mining, both terms are used interchangeably to describe the process of deriving high-quality information from text.

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

Accepted Answer

All the statements about Data Visualization are correct. It is used to communicate information clearly through graphics, helps in analyzing large data sets, and makes complex data more accessible and understandable.

Question 11

Data can be visualized using?
A)graphs
B)charts
C)maps
D)All of the above

Accepted Answer

Data can be visualized using graphs, charts, and maps, making all the options correct. These tools help in representing data visually to easily understand patterns, trends, and outliers.

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

Accepted Answer

Data visualization is a component of the broader data presentation architecture, which encompasses the methods and processes used to visually communicate data insights.

Question 13

Which method shows hierarchical data in a nested format?
A)Treemaps
B)Scatter plots
C)Population pyramids
D)Area charts

Accepted Answer

Treemaps display hierarchical data as a set of nested rectangles, each size being proportional to the data point's value, making it an effective visualization for hierarchical data.

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()

Accepted Answer

The prop.test() function in R is used for testing the null hypothesis that the proportions (probabilities of success) in several groups are the same, or that they equal certain given values. It can be used for inference for 1 proportion using normal approximation when the sample size is large enough for the normal approximation to be appropriate.

Question 15

Which is used to find the factor congruence coefficients?
A)factor.mosaicplot
B)factor.xyplot
C)factor.congruence
D)factor.cumsum

Accepted Answer

The correct choice is C) factor.congruence. This is because factor congruence coefficients are used in factor analysis to assess the similarity between factor structures obtained from different samples or studies. The function name "factor.congruence" directly suggests its use for calculating factor congruence coefficients.

Question 16

Which of the following is tool for checking normality?
A)qqline()
B)qline()
C)anova()
D)lm()

Accepted Answer

qqline() is used in conjunction with a QQ plot to assess if your data comes from a certain distribution, such as a normal distribution, by adding a reference line.

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

Accepted Answer

Data visualization is designed to increase insights and facilitate quicker decision-making, not decrease insights and slow down decisions.

Question 18

Common use cases for data visualization include?
A)Politics
B)Sales and marketing
C)Healthcare
D)All of the above

Accepted Answer

Data visualization is used across various fields, including politics, sales and marketing, and healthcare, to interpret complex data and communicate insights effectively.

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

Accepted Answer

Autocorrelation plots are commonly used to check for randomness in a time series. This type of plot shows whether the elements of the series are positively correlated, negatively correlated, or independent of each other at different lags.

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

Accepted Answer

The value of the gradient at the extrema (minimum or maximum points) of a function is always zero because at these points, the slope of the tangent to the curve is horizontal, indicating no change in the function's value, which mathematically translates to a zero gradient.

Quiz 4: Data Analysis and Visualization

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

How many main statistical methodologies are used in data analysis?

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

Data Analysis is defined by the statistician?

Which of the following is true about hypothesis testing?

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

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

Which of the following is true about regression analysis?

Text Analytics, also referred to as Text Mining?

What is true about Data Visualization?

Data can be visualized using?

Data visualization is also an element of the broader _____________.

Which method shows hierarchical data in a nested format?

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

Which is used to find the factor congruence coefficients?

Which of the following is tool for checking normality?

Which of the following is false?

Common use cases for data visualization include?

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

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