Deck 2: Descriptive Analytics I: Nature of Data,statistical Modeling,

Question 1

There are basic chart types and specialized chart types.A Gantt chart is a specialized chart type.

Answer 1

True

Question 2

Interval data are variables that can be measured on interval scales.

Answer 2

True

Question 3

In the Dallas Cowboys case study,the focus was on using data analytics to decide which players would play every week.

Answer 3

False

Question 4

Descriptive statistics is all about describing the sample data on hand.

Question 5

Visualization differs from traditional charts and graphs in complexity of data sets and use of multiple dimensions and measures.

Question 6

Nominal data represent the labels of multiple classes used to divide a variable into specific groups.

Question 7

Visual analytics is aimed at answering,"What is it happening?" and is usually associated with business analytics.

Question 8

Data source reliability means that data are correct and are a good match for the analytics problem.

Question 9

Data accessibility means that the data are easily and readily obtainable.

Question 10

When telling a story during a presentation,it is best to avoid describing hurdles that your character must overcome,to avoid souring the mood.

Question 11

Data is the main ingredient for any BI,data science,and business analytics initiative.

Question 12

The data storage component of a business reporting system builds the various reports and hosts them for,or disseminates them to users.It also provides notification,annotation,collaboration,and other services.

Question 13

One of SiriusXM's challenges was tracking potential customers when cars were sold.

Question 14

Google Maps has set new standards for data visualization with its intuitive Web mapping software.

Question 15

Dashboards provide visual displays of important information that is consolidated and arranged across several screens to maintain data order.

Question 16

Predictive algorithms generally require a flat file with a target variable,so making data analytics ready for prediction means that data sets must be transformed into a flat-file format and made ready for ingestion into those predictive algorithms.

Question 17

To respond to its market challenges,SiriusXM decided to focus on manufacturing efficiency.

Question 18

In the FEMA case study,the BureauNet software was the primary reason behind the increased speed and relevance of the reports FEMA employees received.

Question 19

Data is the contextualization of information,that is,information set in context.

Question 20

Structured data is what data mining algorithms use and can be classified as categorical or numeric.

Question 21

Which kind of chart is described as an enhanced version of a scatter plot?

A)heat map
B)bullet
C)pie chart
D)bubble chart

Question 22

Which type of visualization tool can be very helpful when a data set contains location data?

A)bar chart
B)geographic map
C)highlight table
D)tree map

Question 23

Which of the following is LEAST related to data/information visualization?

A)information graphics
B)scientific visualization
C)statistical graphics
D)graphic artwork

Question 24

Benefits of the latest visual analytics tools,such as SAS Visual Analytics,include all of the following EXCEPT

A)mobile platforms such as the iPhone are supported by these products.
B)it is easier to spot useful patterns and trends in the data.
C)they explore massive amounts of data in hours,not days.
D)there is less demand on IT departments for reports.

Question 25

This measure of central tendency is the sum of all the values/observations divided by the number of observations in the data set.

A)dispersion
B)mode
C)median
D)arithmetic mean

Question 26

Which characteristic of data means that all the required data elements are included in the data set?

A)data source reliability
B)data accessibility
C)data richness
D)data granularity

Question 27

Kaplan and Norton developed a report that presents an integrated view of success in the organization called

A)metric management reports.
B)balanced scorecard-type reports.
C)dashboard-type reports.
D)visual reports.

Question 28

Which characteristic of data requires that the variables and data values be defined at the lowest (or as low as required)level of detail for the intended use of the data?

A)data source reliability
B)data accessibility
C)data richness
D)data granularity

Question 29

This plot is a graphical illustration of several descriptive statistics about a given data set.

A)pie chart
B)bar graph
C)box-and-whiskers plot
D)kurtosis

Question 30

Which type of visualization tool can be very helpful when the intention is to show relative proportions of dollars per department allocated by a university administration?

A)heat map
B)bullet
C)pie chart
D)bubble chart

Question 31

This measure of dispersion is calculated by simply taking the square root of the variations.

A)standard deviation
B)range
C)variance
D)arithmetic mean

Question 32

Contextual metadata for a dashboard includes all the following EXCEPT

A)whether any high-value transactions that would skew the overall trends were rejected as a part of the loading process.
B)which operating system is running the dashboard server software.
C)whether the dashboard is presenting "fresh" or "stale" information.
D)when the data warehouse was last refreshed.

Question 33

This technique makes no a priori assumption of whether one variable is dependent on the other(s)and is not concerned with the relationship between variables; instead it gives an estimate on the degree of association between the variables.

A)regression
B)correlation
C)means test
D)multiple regression

Question 34

When you tell a story in a presentation,all of the following are true EXCEPT

A)a story should make sense and order out of a lot of background noise.
B)a well-told story should have no need for subsequent discussion.
C)stories and their lessons should be easy to remember.
D)the outcome and reasons for it should be clear at the end of your story.

Question 35

Dashboards can be presented at all the following levels EXCEPT

A)the visual dashboard level.
B)the static report level.
C)the visual cube level.
D)the self-service cube level.

Question 36

Which type of question does visual analytics seeks to answer?

A)Why is it happening?
B)What happened yesterday?
C)What is happening today?
D)When did it happen?

Question 37

What is the fundamental challenge of dashboard design?

A)ensuring that users across the organization have access to it
B)ensuring that the organization has the appropriate hardware onsite to support it
C)ensuring that the organization has access to the latest Web browsers
D)ensuring that the required information is shown clearly on a single screen

Question 38

The Internet emerged as a new medium for visualization and brought all the following EXCEPT

A)worldwide digital distribution of visualization.
B)immersive environments for consuming data.
C)new forms of computation of business logic.
D)new graphics displays through PC displays.

Question 39

Key performance indicators (KPIs)are metrics typically used to measure

A)database responsiveness.
B)qualitative feedback.
C)external results.
D)internal results.

Question 40

What is the management feature of a dashboard?

A)operational data that identify what actions to take to resolve a problem
B)summarized dimensional data to analyze the root cause of problems
C)summarized dimensional data to monitor key performance metrics
D)graphical,abstracted data to monitor key performance metrics

Question 41

________ plots are often used to explore the relationship between two or three variables (in 2-D or 2-D visuals).

Question 42

Typical charts,graphs,and other visual elements used in visualization-based applications usually involve ________ dimensions.

Question 43

When validating the assumptions of a regression,________ assumes that the errors of the response variable are normally distributed.

Question 44

________ management reports are used to manage business performance through outcome-oriented metrics in many organizations.

Question 45

Visual analytics is widely regarded as the combination of visualization and ________ analytics.

Question 46

________ are typically used together with other charts and graphs,as opposed to by themselves,and show postal codes,country names,etc.

Question 47

When validating the assumptions of a regression,________ assumes that the relationship between the response variable and the explanatory variables are linear.

Question 48

________ charts are effective when you have nominal data or numerical data that splits nicely into different categories so you can quickly see comparative results and trends within your data.

Question 49

With dashboards,the layer of information that uses graphical,abstracted data to keep tabs on key performance metrics is the ________ layer.

Question 50

________ statistics is about drawing conclusions about the characteristics of the population.

Question 51

________ charts are a special case of horizontal bar charts that are used to portray project timelines,project tasks/activity durations,and overlap among the tasks/activities.

Question 52

Information dashboards enable ________ operations that allow the users to view underlying data sources and obtain more detail.

Question 53

________ regression is a very popular,statistically sound,probability-based classification algorithm that employs supervised learning.

Question 54

With a dashboard,information on sources of the data being presented,the quality and currency of underlying data provide contextual ________ for users.

Question 55

Dashboards present visual displays of important information that are consolidated and arranged on a single ________.

Question 56

Due to the ________ expansion of information technology coupled with the need for improved competitiveness in business,there has been an increase in the use of computing power to produce unified reports that join different views of the enterprise in one place.

Question 57

A(n)________ is a communication artifact,concerning business matters,prepared with the specific intention of relaying information in a presentable form.

Question 58

________ charts or network diagrams show precedence relationships among the project activities/tasks.

Question 59

________ series forecasting is the use of mathematical modeling to predict future values of the variable of interest based on previously observed values.

Question 60

________ charts are useful in displaying nominal data or numerical data that splits nicely into different categories so you can quickly see comparative results and trends.

Question 61

Describe the difference between descriptive and inferential statistics.

Question 62

Describe the difference between simple and multiple regression.

Question 63

List five types of specialized charts and graphs.

Question 64

List the five most common functions of business reports.

Question 65

What are the most important assumptions in linear regression?

Question 66

According to Eckerson (2006),a well-known expert on BI dashboards,what are the three layers of information of a dashboard?

Question 67

List and describe the three major categories of business reports.

Question 68

Describe categorical and nominal data.