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| Section | Objectives |
|---|---|
| Topic 1: Regression and Correlation Analysis | - Interpreting correlation and causation - Linear regression modeling |
| Topic 2: Hypothesis Testing | - t-tests, chi-square tests, and significance testing - Null and alternative hypotheses |
| Topic 3: Data Fundamentals and Business Analytics | - Data types and data collection methods - Descriptive statistics (mean, median, variance, standard deviation) |
| Topic 4: Decision Making Models | - Risk and uncertainty in decision-making - Decision trees and expected value analysis |
| Topic 5: Probability and Statistical Inference | - Sampling methods and sampling error - Probability concepts and distributions |
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NEW QUESTION # 95
What was the cumulative incidence rate during Year 2 at the university?
Answer: C
Explanation:
Cumulative incidence is the proportion of a population initially at risk that develops a condition during a specified period. It is commonly used in epidemiology to estimate the probability or risk of disease occurrence over time. In this question, the correct Year 2 cumulative incidence rate is 11.84 percent. This represents the proportion of individuals in the university population who developed the condition during that second year, based on the underlying at-risk population used in the original problem. Cumulative incidence is different from prevalence because it counts only new cases that arise during the stated interval rather than all existing cases. It also differs from incidence rate measures that incorporate person-time. Because the answer options are all percentages, the task is to identify the correct calculated proportion for Year 2. Based on the provided choices, 11.84 percent is the correct cumulative incidence value. Therefore, the correct answer is
11.84 percent.
NEW QUESTION # 96
A firm seeks to sharply reduce sales lead times to enhance sales effectiveness and productivity. Which action should the firm take to accomplish this?
Answer: B
Explanation:
To sharply reduce sales lead times, the firm should deploy a customer relationship management tool. A CRM system helps organize customer information, automate follow-up processes, track sales opportunities, streamline communication, and improve coordination across the sales cycle. By reducing manual delays and improving access to customer data, a CRM can make the sales process faster and more efficient, directly supporting stronger sales effectiveness and productivity. Increasing the research and development budget would not address sales-cycle speed. Preparing a media campaign may generate interest or leads, but it does not necessarily reduce the time required to move prospects through the sales process. Additional quality assurance measures are more relevant to process quality and defect prevention than to reducing lead times in sales operations. Because the objective is to improve the speed and efficiency of handling prospects and customers, the most targeted and practical solution is the deployment of a CRM tool. Therefore, the correct answer is to deploy a customer relationship management tool.
NEW QUESTION # 97
When researchers are studying the effect of new drug treatments on patients, bias can be introduced by patients if they are aware of who receives the placebo.
Which type of research design eliminates this type of bias?
Answer: D
Explanation:
Ablind studyis specifically designed to eliminate bias that occurs when participants are aware of treatment assignments. In data-driven decision making and experimental research, patient awareness of receiving a placebo or treatment can influence reported symptoms, perceived effectiveness, and behavior, thereby biasing results.
In a blind study, participants do not know whether they are receiving the treatment or the placebo. This prevents expectations or beliefs from influencing outcomes and ensures that observed effects are attributable to the treatment itself rather than psychological or behavioral factors.
Observational studies and prospective cohort studies do not involve controlled assignment of treatments and therefore cannot eliminate this type of bias. Time series studies analyze data over time but do not address participant awareness of treatment allocation.
By preventing patients from knowing their treatment group, blind studies improve internal validity and support more accurate causal inference. Therefore, the correct answer isD, blind study.
NEW QUESTION # 98
Which two results occur when the null hypothesis is accepted using an F-test?
Choose 2 answers.
Answer: A,B
Explanation:
When the null hypothesis is accepted in anF-test, it indicates that there is no statistically significant difference between group variances or means, depending on the test design. Acceptance occurs when thetest statistic is less than the critical value, meaning the observed variation is within expected limits.
Accepting the null hypothesis implies thatno meaningful differenceexists between the samples. If the test statistic exceeded the critical value, the null hypothesis would be rejected.
Thus, the correct results areA and D.
NEW QUESTION # 99
An organization develops a new strategic plan and seeks ways to improve process performance by reducing variation to only 3.4 defects per million process outputs.
Which tool can the organization use to meet this goal?
Answer: C
Explanation:
Six Sigmais specifically designed to reduce process variation to3.4 defects per million opportunities, making it the correct tool for achieving this goal. In data-driven decision making, Six Sigma provides a structured methodology (DMAIC) for defining problems, measuring performance, analyzing root causes, improving processes, and controlling future outcomes.
Statistical process control supports monitoring, but Six Sigma integrates SPC with strategic improvement initiatives. Linear programming optimizes resource allocation, and just-in-time focuses on inventory efficiency rather than defect reduction.
Therefore, the correct answer isD, Six Sigma.
NEW QUESTION # 100
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