Chapter 2

false

Data source reliability means that data are correct and are a good match for the analytics problem (T F)

false

Nominal data represent the labels of multiple classes used to divide a variable into specific group (T F)

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. (T F)

correlation

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

two

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

predictive

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

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

What is the fundamental challenge of dashboard design?

data granularity

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?

pie chart

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?

standard deviation

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