Shards - 2

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

D) data granularity

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

D) ensuring that the required information is shown clearly on a single screen

Key performance indicators (KPIs) are metrics typically used to measure A) database responsiveness. B) qualitative feedback. C) external results. D) internal results.

D) internal results.

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

False

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

False

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

False

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

True

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

True

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

True

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

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

True

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

True

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

True

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

A) operational data that identify what actions to take to resolve a problem

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

A) standard deviation

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.

B) a well-told story should have no need for subsequent discussion.

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.

B) balanced scorecard-type reports.

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

B) correlation

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

B) geographic map

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.

B) which operating system is running the dashboard server software.

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

C) box-and-whiskers plot

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

C) data richness

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

C) pie chart

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

D) arithmetic mean

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

D) bubble chart