Chapter 2 Part 1 Quiz ISM 3540

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

This technique makes no a priori assumption of whether one variable is dependent on the other(s) and not concerned with the relationship between variables; instead it gives an estimate on the degree of association between the variables. A) means test B) regression C) correlation D) multiple regression

C) correlation

This measure of dispersion is calculated by simply taking the square root of the variations. A) range B) arithmetic mean C) standard deviation D) variance

C) standard deviation

This measure of central tendency is the sum of all the values/observations divided by the number of observations in the data set. A) mode B) dispersion C) median D) arithmetic mean

D) arithmetic mean

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

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

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

True

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

True

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

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

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

false

Which characteristic of data means that all the required data elements are included in the data set? A) data richness B) data source reliability C) data accessibility D) data granularity

A) data richness

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

B) data granularity

Contextual Metadata for a dashboard includes all of 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.

Kaplan and Norton developed a report that presents an integrated view of success in the organization called A) dashboard-type reports. B) metric management reports. C) balanced scorecard-type reports. D) visual reports.

C) balanced scorecard-type reports