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EMC Dell Data Science Foundations Sample Questions (Q62-Q67):

NEW QUESTION # 62
Since R factors are categorical variables, they are most closely related to which data classification level?

A. ordinal
B. nominal
C. ratio
D. interval

Answer: B

NEW QUESTION # 63
What are two data categories that represent quantitative data?

A. Nominal and ratio
B. Ratio and interval
C. Nominal and ordinal
D. Ordinal and interval

Answer: B

NEW QUESTION # 64
In a t-test with unknown variance, what values are used to calculate the t-statistic?

A. Mean, standard deviation, and population size
B. Sample mean, standard deviation, and sample size
C. Sample mean, sample standard deviation, and sample size
D. Mean, sample standard deviation, and population size

Answer: C

NEW QUESTION # 65
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?

Answer: B

NEW QUESTION # 66
On which type of data should you run K-means clustering?

A. Text
B. Numeric
C. Ordinal
D. Nominal

Answer: B

Explanation:
K-means clustering is best suited for numeric data, as it relies on calculating the Euclidean distance between data points, which is meaningful for numerical values.

NEW QUESTION # 67
......

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Latest D-DS-FN-23 Dumps - D-DS-FN-23 Valid Exam Voucher

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EMC Dell Data Science Foundations Sample Questions (Q62-Q67):

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