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EMC Dell Data Science Foundations Sample Questions (Q215-Q220):

NEW QUESTION # 215
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, sample standard deviation, and sample size
C. Sample mean, standard deviation, and sample size
D. Mean, sample standard deviation, and population size

Answer: B

NEW QUESTION # 216
Consider the following SQL query:
SELECT product_id FROM supplier_A
UNION
SELECT product_id FROM supplier_B;
What is the expected result?

A. All product_id values from both tables with duplicates or repeating rows
B. All product_id values from supplier_B table but not from supplier_A table
C. All product_id values from both tables with no duplicates or repeating rows
D. All product_id values from supplier_A table but not from supplier_B table

Answer: C

NEW QUESTION # 217
Which SQL OLAP grouping extension is used to provide hierarchical groupings without examining all possible combinations?

A. GROUNPING
B. ROLLUP
C. GROUP_ID
D. CUBE

Answer: B

NEW QUESTION # 218
Refer to the exhibit.

In the exhibit, the x-axis represents the derived probability of a borrower defaulting on a loan. Also in the exhibit, the pink represents borrowers that are known to have not defaulted on their loan, and the blue represents borrowers that are known to have defaulted on their loan.
Which analytical method could produce the probabilities needed to build this exhibit?

A. Logistic Regression
B. Discriminant Analysis
C. Linear Regression
D. Association Rules

Answer: A

NEW QUESTION # 219
When creating a project sponsor presentation, what is the main objective?

A. Clearly describe the methods and techniques used
B. Show that you met the project goals
C. Show how you met the project goals
D. Show how well the model will meet the SLA (service level agreement)

Answer: B

NEW QUESTION # 220
......

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Practice Test D-DS-FN-23 Pdf & D-DS-FN-23 Latest Study Questions

Best Accurate EMC Practice Test D-DS-FN-23 Pdf | Try Free Demo before Purchase

EMC Dell Data Science Foundations Sample Questions (Q215-Q220):

Pass-Sure Practice Test D-DS-FN-23 Pdf | Easy To Study and Pass Exam at first attempt & Perfect D-DS-FN-23: Dell Data Science Foundations

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