WGU D207 DATA DRIVEN DECISION MAKING OA EXAM AND STUDY GUIDE LATEST 2024 ACTUAL EXAM 500 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+

WGU D207 DATA DRIVEN DECISION MAKING OA

EXAM AND STUDY GUIDE LATEST 2024 ACTUAL

EXAM 500 QUESTIONS AND CORRECT DETAILED

ANSWERS WITH RATIONALES (VERIFIED ANSWERS)

|ALREADY GRADED A+

WGU D207 DATA DRIVEN DECISION MAKING OA

A researcher concludes that bananas create healthy children because the

researcher's notes indicate that children who eat a banana every day are

healthy.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- Confusion of

association and causality

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- Does a

causal relationship truly exist?

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?Choose 2 answers.

Intersection

Union

Multiplication principle

Mutually exclusive - ANSWER- Intersection

Multiplication principle

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 product if they purchase a plumbing product.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- Bayes' theorem

Given the following data set:

9, 12, 14, 10, 8, 11, 12

What is the mode?

8

9

11

12 - ANSWER- 12

Which graphical tool is used to illustrate a possible relationship or

correlation between two variables?

Run chart

Scatterplot

Box plot

Histogram - ANSWER- Scatterplot

What does it mean when an individual data point has a z-score of -2?

The data point is greater than the mean of the data set.

The sample standard deviation of the data set is negative.

The data point is equal to the mean of the data set.

The data point is two standard deviations less than the mean of the data

set. - ANSWER- The data point is two standard deviations less than the

mean of the data set.

A research study examined the impact of product advertisement

exposure on that product's brand awareness. The appropriate statistical

test indicates that the null hypothesis should be rejected at the 5%

significance level.What can be concluded from this study?

The advertisement was effective in increasing sales.

The advertisement was effective in building brand awareness.

Five percent of the subjects did not like the advertisement.

Ninety-five percent of the subjects liked the brand. - ANSWER- The

advertisement was effective in building brand awareness.

A manager analyzes a data set that includes information on individual

incomes. The manager knows that the data set is fairly representative of

the general population and includes several millionaires.Based on this

data set, which measure of central tendency best represents the middle of

the distribution?