Question 1

Suppose your university administrators wish to summarize student GPA on Major, Gender, High School, Home City and ZIP Code dimensions. This cannot be done with one data cube.

Accepted Answer

A data cube can be used to summarize data across multiple dimensions, including Major, Gender, High School, Home City, and ZIP Code, by organizing the data in a multi-dimensional array.

Question 2

Some insurance companies can detect fraudulant claims using BI software .

Accepted Answer

BI (Business Intelligence) software can analyze data to identify patterns and anomalies, which can help insurance companies detect fraudulent claims.

Question 3

Users still need help from the IT function of the organization to create customer reports using modern reporting tools.

Accepted Answer

False

Question 4

In OLAP data cubes, you would likely find numeric measures categorized by time and geography.

Accepted Answer

OLAP data cubes are designed to analyze large amounts of multidimensional data, including numeric measures such as sales or revenue. These measures are often categorized by time (such as month or year) and geography (such as region or country).

Question 5

To solve the product mix problem that will maximize the profits, you can use Excel's Solver add-in.

Accepted Answer

Excel's Solver add-in is a powerful tool that can be used to solve optimization problems, including product mix problems. It can be used to find the values of decision variables that will maximize or minimize a particular objective function, subject to constraints. Therefore, the statement is true.

Question 6

A conversion funnel is a visual depiction of a set of words that have been grouped together because of the frequency of their occurrence.

Accepted Answer

A conversion funnel is actually a visual representation of the steps a consumer takes towards completing a desired action, such as making a purchase or filling out a form. It shows how many people enter the funnel and how many drop out at each stage, ultimately leading to the final conversion.

Question 7

Data scientists do not need much business domain knowledge.

Accepted Answer

While data scientists primarily focus on data analysis and modeling, they also need a good understanding of the business domain they are working in. This helps them ask the right questions, identify relevant data sources, and ensure their insights are actionable and aligned with business goals.

Question 8

In the regression line Y = a+ bX + e, a is the slope of the regression line.

Accepted Answer

In the regression line Y = a+ bX + e, a is the intercept or the y-intercept, not the slope. The slope is represented by b.

Question 9

A vehicle routing optimization system helps in maximizing the number of drivers being assigned.

Accepted Answer

A vehicle routing optimization system helps in optimizing the routes taken by drivers and minimizing travel time and distance, but it does not necessarily maximize the number of drivers being assigned.

Question 10

In linear regression, you are to find a line that best fits the data. Sometimes the line may be curved.

Accepted Answer

Linear regression assumes a linear relationship between the independent variable and the dependent variable, so the line of best fit is always a straight line. If the relationship between the variables is not linear, other types of regression models such as polynomial regression or exponential regression may be used.

Question 11

The data for BI (business intelligence) comes from many sources .

Accepted Answer

Business intelligence data can come from a variety of sources, such as databases, web analytics, social media, customer feedback, and more.

Question 12

Creative data scientists - a key component of BI efforts in an organization - are people who are primarily focused on coming up with novel ways of analyzing data.

Accepted Answer

The answer of Creative data scientists - a key component...

Question 13

Linear regression is useful when you wish to predict the value of a quantitative variable based on a another quantitative variable.

Accepted Answer

Linear regression is a statistical method used to model the relationship between two quantitative variables, where one variable is considered the predictor or independent variable and the other variable is considered the response or dependent variable. The goal of linear regression is to find the best-fitting straight line through the data points that can be used to predict the value of the response variable based on the value of the predictor variable. Therefore, linear regression is useful when you wish to predict the value of a quantitative variable based on another quantitative variable.

Question 14

Excel's scenario manager can be used to solve optimization-type problems .

Accepted Answer

Excel's Scenario Manager is used for comparing different sets of input values and their impact on the output, but it does not solve optimization problems. Solver is the tool used for optimization in Excel.

Question 15

Data cubes can be created on an ad hoc basis. There is no need to create them ahead of time.

Accepted Answer

The answer of Data cubes can be created on an...

Question 16

If you wish to have a visual depiction of relative frequencies of words in a document, a word cloud would be an appropriate option .

Accepted Answer

A word cloud is a visual representation of the most frequently occurring words in a document or text corpus, where the size of each word represents its relative frequency or importance. Therefore, it is a suitable option for representing relative frequencies of words in a document.

Question 17

Data mining is used to explore large amounts of data, looking for hidden patterns that can be used to predict future trends and behaviors.

Accepted Answer

Data mining is indeed used to explore large amounts of data and uncover patterns that can be utilized to make predictions about future trends and behaviors.

Question 18

Suppose you are viewing a database of your monthly expenses, categorized under broad headings such as food, entertainment and accommodation. If you have drill down ability, you are able to view details under each category.

Accepted Answer

Drill down ability allows the user to view details under each broad heading or category.

Question 19

Data governance involves identifying people who are responsible for fixing and preventing issues with data.

Accepted Answer

Data governance is the overall management of the availability, usability, integrity, and security of the data used in an organization. It involves establishing roles and responsibilities for data management, including identifying individuals responsible for fixing and preventing issues related to data quality, accessibility, and security.

Question 20

For an organization to get real value from its BI efforts, it must have a solid data management program.

Accepted Answer

A solid data management program is essential for effective BI as it ensures that data is accurate, reliable, and accessible. Without proper data management processes, BI efforts can be hampered by inconsistent data, inaccurate analyses, and difficulties in accessing the necessary information.

Quiz 6: Business Intelligence and Analytics