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[2025] EMC DEA-7TT2 Questions: Fosters Your Exam Passing Skills

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Associate - Data Science and Big Data Analytics v2 Exam Valid Exam Preparation & DEA-7TT2 Latest Learning Material & Associate - Data Science and Big Data Analytics v2 Exam Test Study Practice

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EMC DEA-7TT2: Associate - Data Science and Big Data Analytics v2 is a certification exam that is designed for individuals who want to validate their knowledge and skills in the field of data science and big data analytics. DEA-7TT2 Exam is conducted by Dell EMC Education Services, and it is one of the most recognized and respected certifications in the industry.

EMC Associate - Data Science and Big Data Analytics v2 Exam Sample Questions (Q122-Q127):

NEW QUESTION # 122
You are using MADlib for Linear Regression analysis. Which value does the statement return?
SELECT (linregr(depvar, indepvar)).r2 FROM zeta1;
Response:

A. Standard error
B. Goodness of fit
C. Coefficients
D. P-value

Answer: B

NEW QUESTION # 123

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:

Answer: A

NEW QUESTION # 124
Refer to the exhibit.

You are asked to write a report on how specific variables impact your client's sales using a data set provided to you by the client. The data includes 15 variables that the client views as directly related to sales, and you are restricted to these variables only.
After a preliminary analysis of the data, the following findings were made:
1. Multicollinearity is not an issue among the variables
2. Only three variables-A, B, and C-have significant correlation with sales You build a linear regression model on the dependent variable of sales with the independent variables of A, B, and C. The results of the regression are seen in the exhibit.
Which interpretation is supported by the analysis?
Response:

A. Variables A, B, and C are significantly impacting sales, but are not effectively estimating sales
B. Due to the R2 of 0.10, the model is not valid - the linear regression should be rerun with all 15 variables forced into the model to increase the R2
C. Variables A, B, and C are significantly impacting sales and are effectively estimating sales
D. Due to the R2 of 0.10, the model is not valid - a different analytical model should be attempted

Answer: A

NEW QUESTION # 125
What is LOESS used for?
Response:

A. It fits a smoothed curve to scatterplot data, to give a general sense of the data,s behavior.
B. It is run after a one-way ANOVA, to determine which population has the highest mean value.
C. It plots a continuous variable versus a discrete variable, to compare distributions across classes.
D. It is a significance test for the correlation between two variables.

Answer: A

NEW QUESTION # 126
What does a leaf node represent in a decision tree?
Response:

A. Decision point on a variable
B. Root of the decision tree
C. Outcome of a test on a variable
D. Assigned class label

Answer: D

NEW QUESTION # 127
......

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