ISYS- Chapter 2

Dashboards can be presented at all the following levels EXCEPT: -Static Report Level -Visual Dashboard Level -Visual Cube level -Self-Service Cube Level

-Visual Cube Level

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

Arithmetic Mean

Key performance Indicators (KPIs) are metrics typically used to measure:

internal results

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

new forms of computation of business logic

Contextual metadata for a dashboard includes all the following EXCEPT: -Whether dashboard is presenting "fresh" or "stale" information -When data warehouse was last refreshed -Whether any high-value transactions that would skew overall trends were rejected as part of loading process -Which operating system is running the dashboard server software.

which operating system is running the dashboard server software.

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

Box-and-Whiskers Plot

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

Bubble chart

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.

Correlation

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?

Data granularity

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

Data richness

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

False

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

False

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

False

T/F- 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.

False

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

False

What is the Management feature of a dashboard?

Operational data that identify what actions to take to resolve a problem

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?

Pie Chart

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

Standard deviations

T/F- Data is main ingredient for any BI, data science, and business analytics initiative

True

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

True

T/F- Descriptive statistics is all about describing the sample data on hand.

True

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

True

T/F- Interval data are variables that can be measured on interval scales.

True

T/F- One of SiriusXM's challenges was tracking potential customers when cars were sold.

True

T/F- 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.

True

T/F- Structured data is what data mining algorithms use and can be classified as categorical or numeric

True

T/F- There are basic chart types and specialized chart types. A Gantt chart is a specialized chart type.

True

T/F- Visualization differs from traditional charts and graphs in complexity of data sets and use of multiple dimensions and measures

True

Which type of question does visual analytics seek to answer?

Why is it happening?

What is the fundamental challenge of dashboard design?

Ensuring that the required information is shown clearly on the screen

Benefits of the latest visual analytics tools, such as SAS Visual Analytics, include all of the following EXCEPT -Explore massive amounts of data in hours, not days -Mobile platforms such as iPhone are supported by these products -Easier to spot useful patterns and trends in data -Less demand on IT for reports

Explore massive amounts of data in hours, not days.