Data-Driven Decision Making C207
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Free Data-Driven Decision Making C207 Questions
A clothing company wants to predict sales figures based on the amount spent on advertising. Which type of regression analysis should this company use?
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Linear regression
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Time series regression
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Logistic regression
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multiple choice linear regression
Explanation
Explanation
Correct answer: (A.) Linear regression
The company is trying to predict a continuous numerical outcome (sales figures) based on a single predictor variable (advertising spend). This is the classic use case for simple linear regression, which models the relationship between one independent variable and one dependent variable using a straight-line relationship. Time series regression is used for time-based data trends, logistic regression is for categorical outcomes, and “multiple choice linear regression” is not a standard statistical method.
A manager is faced with a declining sales trend in their department. Which of the following actions best exemplifies the decision-making process as outlined in the text
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Ignoring the trend and continuing with the current strategy.
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Identifying the decline, gathering sales data, analyzing customer feedback, and adjusting the marketing strategy
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Consulting with the team to brainstorm new product ideas without analyzing current data.
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Making a quick decision to cut prices without understanding the underlying issues.
Explanation
Correct Answer B. Identifying the decline, gathering sales data, analyzing customer feedback, and adjusting the marketing strategy.
Explanation:
The decision-making process, as outlined in the text, involves several important steps: identifying the problem, gathering relevant data, analyzing the information, and then adjusting the strategy based on that analysis. In this case, the correct approach is to first identify the declining sales trend, gather relevant data such as sales figures and customer feedback, and then use this data to make informed adjustments to the marketing strategy. This process ensures that decisions are based on evidence rather than assumptions.
Why other options are wrong:
A. Ignoring the trend and continuing with the current strategy.
Ignoring the issue and not adjusting the strategy goes against the decision-making process. Continuing with the current approach without addressing the problem will likely lead to worsening results.
C. Consulting with the team to brainstorm new product ideas without analyzing current data.
While brainstorming new product ideas may be useful, doing so without first analyzing the current sales data and customer feedback ignores a critical part of the decision-making process, which involves understanding the problem thoroughly before exploring potential solutions.
D. Making a quick decision to cut prices without understanding the underlying issues.
Making a hasty decision, such as cutting prices, without understanding the root cause of the sales decline can lead to unintended consequences. A more thorough analysis is needed to ensure that price cuts will address the real issue rather than just provide a temporary fix.
What results from starting an analysis with flawed data? (Choose 2 answers.)
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Spreadsheets must be used to increase the likelihood of analyzing the flawed data.
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More time is spent managing data than analyzing data.
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Data must be put in a table or a chart so that errors can be more easily detected.
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Missing data tend to skew the results of the analysis.
Explanation
Explanation
Correct answer: B. More time is spent managing data than analyzing data.and (D.) Missing data tend to skew the results of the analysis.
Starting an analysis with flawed data typically leads to inefficiencies and distorted conclusions. One common outcome is that analysts spend disproportionate time cleaning, validating, and managing data rather than performing actual analysis. Another consequence is that missing or incorrect data can bias results, leading to skewed or inaccurate insights. The other options either describe corrective steps (such as structuring data for error detection) or irrelevant statements.
Phone calls for a company are routed randomly to one of eight call centers. Six are based in the United States, and two are based in another country. What is the probability that an incoming call will be routed to a U.S.-based call center?
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25%
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33%
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67%
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75%
Explanation
Explanation
Correct answer: (D.) 75%
The probability of a randomly selected outcome is calculated as the number of favorable outcomes divided by the total number of outcomes. Here, there are 6 U.S.-based call centers out of a total of 8 call centers. So the probability is 6/8, which simplifies to 3/4 or 0.75, equivalent to 75%.
A nonprofit organization ran a fundraiser and would like to determine the amount of a typical donation. Which statistic is less affected by outliers and skewed data and should be used to determine the amount of a typical donation?
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Mode
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Median
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Z-score
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Mean
Explanation
Explanation
Correct answer: (B.) Median
The median is the most appropriate measure of central tendency when data is skewed or contains outliers because it is resistant to extreme values. Donation data often includes a few very large contributions that can distort the mean, making it unrepresentative of a “typical” donation. The median instead reflects the middle value of the dataset and provides a more accurate picture of a typical donor contribution. The mean is sensitive to outliers, the mode only reflects the most frequent value, and a z-score is not a measure of central tendency.
What type of analysis is used to evaluate the effectiveness of the employee program
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Cost-benefit analysis
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Qualitative analysis
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SWOT analysis
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Linear regression analysis
Explanation
Correct Answer A. Cost-benefit analysis
Explanation:
A cost-benefit analysis evaluates the effectiveness of a program by comparing the benefits it generates with the costs incurred to implement it. This method helps determine if the program is a worthwhile investment by quantifying the return on investment (ROI) in monetary terms. It allows managers to assess whether the benefits outweigh the costs and if the program delivers value.
Why other options are wrong:
B. Qualitative analysis
Qualitative analysis focuses on non-numeric data, such as opinions, feedback, or behavior, and may not directly evaluate effectiveness in terms of financial or measurable outcomes, which is the primary focus of a cost-benefit analysis.
C. SWOT analysis
A SWOT analysis examines the strengths, weaknesses, opportunities, and threats of a program but does not directly evaluate the program’s effectiveness in terms of costs and benefits.
D. Linear regression analysis
Linear regression is a statistical method used to model the relationship between variables and is not specifically designed to evaluate the cost-effectiveness of a program, which is what a cost-benefit analysis does.
A manager is faced with a declining sales trend in their department. They gather data on customer feedback, market trends, and competitor strategies. Which initial step of the decision-making process are they primarily engaged in
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Finding and defining the problem
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Gathering information
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Establishing decision objectives
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Evaluating alternatives
Explanation
Correct Answer B. Gathering information
Explanation
The manager is actively collecting data on customer feedback, market trends, and competitor strategies, which is the step of gathering information. This phase is crucial in decision-making as it provides the foundation needed for later steps such as defining the problem, evaluating alternatives, and selecting a solution. The process of gathering relevant data ensures that decisions are based on up-to-date and accurate insights.
Why other options are wrong
A. Finding and defining the problem
Although the manager is working on understanding the situation, this step involves framing the issue clearly and recognizing the core problem. Gathering information is typically done before the problem is fully defined.
C. Establishing decision objectives
Establishing decision objectives comes after gathering information and helps guide what needs to be achieved. The manager is still in the information-gathering phase, not yet defining specific objectives.
D. Evaluating alternatives
Evaluating alternatives occurs after sufficient data has been collected and the problem has been defined. The manager has not yet reached the stage of assessing different solutions, but is focused on gathering information first.
Which term describes a response that appears the greatest number of times compared to other responses in a survey?
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Outlier
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Median
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Mean
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Mode
Explanation
Explanation
Correct answer: (D.) Mode
The mode is the measure of central tendency that identifies the value occurring most frequently in a dataset. In survey analysis, it represents the most common response among all participants. The median is the middle value when data is ordered, the mean is the arithmetic average, and an outlier is an extreme value that differs significantly from other observations.
The ideation step in design thinking involves
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Accepting problems as they are delivered.
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Defining problems by research and observation.
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Visualizing and brainstorming potential solutions in collaboration with others.
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Looking for answers to assigned problems through standard procedures.
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Testing and modifying the potential solution over and over to achieve the best outcome.
Explanation
Correct Answer C. Visualizing and brainstorming potential solutions in collaboration with others.
Explanation:
The ideation step in design thinking is focused on brainstorming and coming up with creative solutions to the defined problem. This phase encourages collaboration, idea generation, and thinking outside the box. It's about exploring different possibilities, often through team-based activities such as brainstorming or prototyping, to create innovative solutions.
Why other options are wrong:
A. Accepting problems as they are delivered.
This doesn't align with the ideation phase. Design thinking encourages reframing problems and exploring creative solutions rather than accepting problems as given.
B. Defining problems by research and observation.
This is part of the earlier phase of design thinking, known as the "empathize" phase, where understanding the problem through research and observation is key.
D. Looking for answers to assigned problems through standard procedures.
Design thinking encourages non-standard, creative thinking during the ideation phase, rather than relying on traditional or predefined solutions.
E. Testing and modifying the potential solution over and over to achieve the best outcome.
This is a key part of the "test" phase in design thinking, not the ideation phase. Testing and refining solutions happens after brainstorming ideas.
An analyst used multiple linear regression to explore how a big box store's sales y are predicted by the store's advertising expenditure dollars variable x1 and the advertising expenditure dollars of a specialty store variable x2 in the same market. The estimated regression is y = 651.67 + 92.30x1 - 26.89x2. How are advertising expenditures and sales related in this scenario?
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If the specialty store increases its advertising expenditures, it will decrease the big box store's sales.
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If the big box store increases its advertising expenditures, its sales will decrease.
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If the big box store decreases its advertising expenditures, its sales will increase.
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If the specialty store decreases its advertising expenditures, it will decrease the big box store's sales.
Explanation
Explanation
Correct answer: (A.) If the specialty store increases its advertising expenditures, it will decrease the big box store's sales.
In a multiple linear regression model, each coefficient represents the marginal effect of its associated variable while holding other variables constant. Here, the coefficient of x2 (specialty store advertising) is −26.89, meaning that as the specialty store increases its advertising expenditure, the big box store’s sales decrease, assuming x1 remains constant. The coefficient of x1 is positive, meaning increases in the big box store’s own advertising increase its sales, so any option claiming the opposite effect of x1 is incorrect.
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