D-DS-FN-23 Reliable Test Duration, Reliable Exam D-DS-FN-23 Pass4sure
D-DS-FN-23 Reliable Test Duration, Reliable Exam D-DS-FN-23 Pass4sure
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Tags: D-DS-FN-23 Reliable Test Duration, Reliable Exam D-DS-FN-23 Pass4sure, D-DS-FN-23 Valid Exam Registration, Premium D-DS-FN-23 Exam, D-DS-FN-23 Study Dumps
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EMC Dell Data Science Foundations Sample Questions (Q72-Q77):
NEW QUESTION # 72
What is LOESS used for?
- A. It is run after a one-way ANOVA, to determine which population has the highest mean value.
- B. It fits a smoothed curve to scatterplot data, to give a general sense of the data's behavior.
- C. It is a significance test for the correlation between two variables.
- D. It plots a continuous variable versus a discrete variable, to compare distributions across classes.
Answer: B
NEW QUESTION # 73
Which word or phrase completes the statement; "Excessive emphasis color is to Bar chart as
__________________."?
- A. Multicollinearity is to OLS
- B. Confidence interval is to regression
- C. Confidence is to leverage
- D. Multicollinearity is to serial correlation
Answer: A
NEW QUESTION # 74
What would be considered "Big Data"?
- A. Daily Log files from a web server that receives 100, 000 hits per minute
- B. An OLAP Cube containing customer demographic information about 100, 000, 000 customers
- C. Aggregated statistical data stored in a relational database table
- D. Spreadsheets containing monthly sales data for a Global 100 corporation
Answer: A
NEW QUESTION # 75
You have created a Logistic Regression model to predict customer churn for your company. The company's Marketing department wants to use your model to identify at-risk customers and offer incentives to keep them from leaving.
Using two different thresholds for the model provides the two confusion matrices shown in the graphic.
Marketing understands the relative costs of missing at-risk customers versus offering incentives to customers who are not at risk. Therefore, you need their advice on how to set the appropriate threshold on the churn model.
You are meeting with the Marketing team. In the meeting, you plan to state: "Raising the threshold from 0.5 to 0.75 reduces the number of unnecessary incentives that can be offered, at the cost of missing more of the customers who churned." What is the most appropriate visual to reinforce this statement?
- A.
- B.
- C.
- D.
Answer: A
NEW QUESTION # 76
Refer to the exhibit.
You ran a linear regression, and the final output is seen in the exhibit. Based only on the information in the exhibit and an acceptable confidence level of 95%, how would you interpret the interaction of variable D with the dependent variable?
- A. For every 1 unit increase in variable D, holding all other variables constant, we can expect the dependent variable to increase by 10.23 units
- B. For every 1 unit increase in variable D, holding all other variables constant, we can expect the dependent variable to be multiplied by 10.23 units
- C. In this model, Variable D is not significantly interacting with the dependent variable
- D. Variable D is more significant than variables A, B, and C.
Answer: C
NEW QUESTION # 77
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