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最新的 Dell EMC Certification DEA-7TT2 免費考試真題:

1. Which participant in a data analytics project is typically responsible for assessing the validity of the model?
Response:

A) Project sponsor
B) Business user
C) Project manager
D) Data scientist

2.
You have created a Linear Regression model to predict total sales based on variables M, N, P and Q as shown in the graphic. You originally expected all variables to have positive coefficients. Which action would you take?
Response:

A) Accept all variables and begin model validation steps against holdout data
B) Accept none of the variables and investigate correlations between all variables
C) Accept only positive variables and investigate potential correlation with the dependent variable
D) Accept only statistically significant variables and investigate correlated independent variables

3.
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?
Response:

A)

B)

C)

D)

4. In data visualization, what is used to focus the audience on a key part of a chart?
Response:

A) Detailed text
B) A data table
C) Pastel colors
D) Emphasis colors

5. Refer to the exhibit.

What provides the decision tree for predicting whether or not someone is a good or bad credit risk. What would be the assigned probability, p(good), of a single male with no known savings?
Response:

A) 0.83
B) 0.6
C) 0
D) 0.498

問題與答案：