WGU C207 DATA DRIVEN DECISION-MAKING OBJECTIVE

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WGU C207 DATA DRIVEN DECISION-MAKING OBJECTIVE

ASSESSMENT EXAM A, B &C LATEST ACTUAL EXAM

QUESTIONS AND ANSWERS GRADED A+

WGU C207 Data Driven Decision Making OBJECTIVE ASSESSMENT A A healthcare study follows a particular sample over time to identify how the health habits of teenagers impact their likelihood of acquiring various diseases later in their life in the hope that the healthcare organization will be able to create early prevention programs. Which type of research design does this study describe?

• Double blind study
• Systematic study
• Cohort study
• Experimental study - ANSWER-c

Several missing values in a particular field in a dataset were observed. The likelihood of a record having a missing value is correlated to another variable in the dataset. Which two types of error might be introduced into the dataset if the removed record included missing values?

• Systematic error
• Omission error
• Random error
• Typographical error - ANSWER-a, b

A company is trying to increase its online sales revenue by improving its e-mail advertising campaign for repeat customers as well as new customers. Which two variables would be used in determining a campaign to maximize revenue gain? 1 / 4

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• Number of purchases per e-mail
• E-mail content
• Spending per purchase
• Cost per e-mail - ANSWER-a, c

This statistical procedure compares outcomes of different drug testing results

• Anova
• Correlation
• Control Charts - ANSWER-a

This statistical procedure is used to help understand effective marketing and to spend advertising dollars efficiently

• Anova
• Correlation
• Control Charts - ANSWER-b

This statistical procedure monitors production process

• Anova
• Correlation
• Control Charts - ANSWER-c

A researcher concludes that bananas create healthy children because the researcher's notes indicate that children who eat a banana every day are healthy. 2 / 4

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3 Which misuse of statistics would this study be an example of if these children also eat a balanced diet and exercise daily?

• Unfounded assumptions
• Lack of blinding
• Faulty operationalization
• Confusion of association and causality - ANSWER-d

In the month of December, there is a strong positive correlation between airline ticket sales and retail sales.Which question should the researcher consider before concluding that the correlation statistic implies that airline sales drive retail sales?

• Does a causal relationship truly exist?
• Are the data biased?
• Is the sample size large enough?
• Does the sample accurately reflect the population? - ANSWER-a

A medical care provider determines the probability that a patient needs treatment for a broken bone, the probability that a patient needs treatment for a concussion, and the probability that a patient needs treatment for both a broken bone and a concussion. Which two techniques apply in finding the probability that a patient needs treatment for a broken bone and a concussion?

• Intersection
• Union
• Multiplication principle 3 / 4

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• Mutually exclusive - ANSWER-a, c

A hardware store has found that there is a 0.25 probability that a customer buys an electrical product, a 0.45 probability that a customer buys a plumbing product, and a 0.10 probability that a customer buys an electrical part if they purchase a plumbing part.Given this information, which statistical rule can be used to determine the probability that a customer buys a plumbing product given that this customer has purchased an electrical product?

• Bayes' Theorem
• Multiplication
• Combination
• Conditional probability - ANSWER-a

Given the following data set:

9 12 14 10 8 11 12

What is the mode?

• 8
• 9
• 11
• 12 - ANSWER-d
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