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| Section | Objectives |
|---|---|
| Decision-Making Frameworks | - Evidence-Based Decision Making - Cost-Benefit Analysis - Rational Decision Models - Risk Analysis and Assessment |
| Business Intelligence and Analytics | - Predictive Analytics Basics - Data Mining Concepts - Dashboards and Reporting - Key Performance Indicators (KPIs) |
| Data Analysis Fundamentals | - Descriptive Statistics - Data Quality and Cleaning - Data Visualization Techniques - Data Types and Measurement Scales |
| Data-Driven Culture and Communication | - Ethical Considerations in Data Use - Presenting Data Insights - Stakeholder Communication - Building Data-Informed Organizations |
>> Data-Driven-Decision-Making Exam Fragen <<
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92. Frage
A financial analyst theorizes that commute times increase as the percentage of land availability for homes in a city decreases. To test this theory, the analyst uses a regression analysis. Which analysis result is supportive of this analyst's theory?
Antwort: B
Begründung:
A regression result is most supportive of a theory when it shows a strong relationship between the independent and dependent variables. In this case, the analyst believes that commute times rise as land availability for homes falls. Among the answer choices, an R-squared value of 0.90 provides the strongest support because it indicates that about 90 percent of the variation in commute times is explained by the regression model. This suggests a very strong model fit. By contrast, an R-squared value of 0.10 would indicate a weak explanatory relationship. The p-values of 0.50 and 1 do not support the theory because large p- values suggest that the regression coefficient is not statistically significant. In regression analysis, a low p- value typically supports the idea that the predictor variable has a meaningful relationship with the outcome variable. Since no low p-value is offered, the best supportive result among the choices is the high R-squared value. Therefore, the correct answer is 0.90 because it indicates the model strongly explains the observed pattern.
93. Frage
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?
Antwort: A
Begründung:
Probability is calculated as the number of favorable outcomes divided by the total number of possible outcomes, assuming each outcome is equally likely. In this case, there are eight call centers total, and six of them are located in the United States. Since calls are routed randomly, each call center has an equal chance of receiving an incoming call. Therefore, the probability that a call is routed to a U.S.-based call center is 6 out of 8. This fraction simplifies to 3 out of 4, which is equal to 0.75 or 75 percent. The answer choices 25 percent and 33 percent are too small because they do not match the proportion of U.S. call centers. The option 67 percent is closer but still incorrect, as 6 divided by 8 is not 0.67. This is a basic probability problem involving equally likely outcomes. Because six of the eight centers are in the United States, the correct probability is 75 percent.
94. Frage
A car dealership sells both new and used cars. The number of new cars sold on a given day ranges from 5 to
30 while the number of used cars sold ranges from 5 to 40. The number of used cars sold is mutually exclusive to the number of new cars sold.
Which statistic would be used to compare the number of new and used car sales on any given day?
Antwort: D
Begründung:
Thechi-square statisticis used to compare frequencies of categorical, mutually exclusive outcomes. In data- driven decision making, it is appropriate for analyzing differences between observed counts.
New and used car sales represent mutually exclusive categories, making chi-square the correct choice.
Therefore, the correct answer isB.
95. Frage
A researcher wants to estimate the average wholesale price of a gallon of gas in the United States. Several gas station owners along the East Coast are asked what price they pay wholesale for a gallon of gas. The researcher then averages these values for the sample mean price of a gallon of gas. Which problem would be discovered if this researcher's work were evaluated?
Antwort: C
Begründung:
The key problem in this study is that the sample is not representative of the entire population. The researcher is attempting to estimate the average wholesale gas price for the whole United States, but only collects data from gas station owners along the East Coast. Because regional gas prices can differ due to transportation costs, taxes, regulations, supply conditions, and market structure, using only one geographic area creates a sampling problem. A representative sample should reflect the diversity of the full population being studied. In this case, the population includes gas stations from all parts of the country, not just one region. There is no information suggesting faulty calibration, since no measuring instrument is involved. Response bias is also not the primary issue because the scenario does not indicate that respondents are misreporting prices.
Conscious bias is less appropriate because the most obvious flaw is the limited sampling frame. This is a classic example of sampling bias caused by undercoverage. Therefore, the correct answer is that the sample data are not representative of the population.
96. Frage
A manager has been assigned to manage a digital marketing analytics team. The manager tasks the team with determining similarities among existing customers in the company's database, such as similarities in products purchased, location, and the average amount spent per order among existing customers.
Which type of activity will help the team accomplish this task?
Antwort: D
Begründung:
Data miningis the appropriate activity for identifying patterns, similarities, and relationships within large datasets. In data-driven decision making, data mining techniques such as clustering and association analysis are commonly used to segment customers based on behavior and characteristics.
The task described involves uncovering hidden patterns across multiple variables, which aligns directly with data mining objectives. Linear programming focuses on optimization, regression predicts outcomes, and touchpoint analysis examines customer interactions rather than similarities.
Therefore, the correct answer isA, data mining.
97. Frage
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