TESTKING DEA-7TT2 LEARNING MATERIALS, DEA-7TT2 POSITIVE FEEDBACK

Testking DEA-7TT2 Learning Materials, DEA-7TT2 Positive Feedback

Testking DEA-7TT2 Learning Materials, DEA-7TT2 Positive Feedback

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Tags: Testking DEA-7TT2 Learning Materials, DEA-7TT2 Positive Feedback, Authorized DEA-7TT2 Certification, Valid DEA-7TT2 Test Duration, DEA-7TT2 Guide Torrent

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EMC Associate - Data Science and Big Data Analytics v2 Exam Sample Questions (Q78-Q83):

NEW QUESTION # 78
When would you use a Wilcoxson Rank Sum test?
Response:

  • A. When the populations represent the sums of other values
  • B. When the data cannot easily be sorted
  • C. When the data can easily be sorted
  • D. When you cannot make an assumption about the distribution of the populations

Answer: D


NEW QUESTION # 79
A data scientist plans to classify the sentiment polarity of 10, 000 product reviews collected from the Internet. What is the most appropriate model to use? Suppose labeled training data is available.
Response:
Naive Bayesian classifier

  • A. Linear regression
  • B. Logistic regression
  • C. K-means clustering

Answer: A


NEW QUESTION # 80
Refer to the exhibit.

You have scored your Naive bayesian classifier model on a hold out test data for cross validation and determined the way the samples scored and tabulated them as shown in the exhibit.
What are the the False Positive Rate (FPR) and the False Negative Rate (FNR) of the model?
Response:

  • A. FPR = 262/15 FNR = 288/26
  • B. FPR = 288/26 FNR = 262/15
  • C. FPR = 26/288 FNR = 15/262
  • D. FPR = 15/262 FNR = 26/288

Answer: D


NEW QUESTION # 81
In which phase of the data analytics lifecycle do Data Scientists spend the most time in a project?
Response:

  • A. Communicate Results
  • B. Model Building
  • C. Discovery
  • D. Data Preparation

Answer: D


NEW QUESTION # 82
You do a Student's t-test to compare the average test scores of sample groups from populations A and B. Group A averaged 10 points higher than group B. You find that this difference is significant, with a p-value of 0.03.
What does that mean?
Response:

  • A. There is a 3% chance that a sample group from population A will score 10 points higher that a sample group from population B.
  • B. There is a 97% chance that a sample group from population A will score 10 points higher that a sample group from population B.
  • C. The difference in scores between a sample from population A and a sample from population B will tend to be within 3% of 10 points.
  • D. There is a 3% chance that you have identified a difference between the populations when in reality there is none.

Answer: D


NEW QUESTION # 83
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