最新的EMC Associate - Data Science and Big Data Analytics v2 - DEA-7TT2免費考試真題
What is a good use case for logistic regression?
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正確答案: C
You have used k-means clustering to classify behavior of 100, 000 customers for a retail store. You decide to use household income, age, gender and yearly purchase amount as measures. You have chosen to use 8 clusters and notice that 2 clusters only have 3 customers assigned.
What should you do?
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What should you do?
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正確答案: B
In linear regression, what indicates that an estimated coefficient is significantly different than zero?
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正確答案: A
When creating a project sponsor presentation, what is the main objective?
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正確答案: D
Consider a scale that has five (5) values that range from "not important" to "very important". Which data classification best describes this data?
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正確答案: C
What tasks need to be completed when designing an analytic sandbox?
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正確答案: A
The Marketing department of your company wishes to track opinion on a new product that was recently introduced. Marketing would like to know how many positive and negative reviews are appearing over a given period and potentially retrieve each review for more in- depth insight.
They have identified several popular product review blogs that historically have published thousands of user reviews of your company's products. You have been asked to provide the desired analysis.
You examine the RSS feeds for each blog and determine which fields are relevant. You then craft a regular expression to match your new product's name and extract the relevant text from each matching review.
What is the next step you should take?
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They have identified several popular product review blogs that historically have published thousands of user reviews of your company's products. You have been asked to provide the desired analysis.
You examine the RSS feeds for each blog and determine which fields are relevant. You then craft a regular expression to match your new product's name and extract the relevant text from each matching review.
What is the next step you should take?
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正確答案: A
What is the difference between the array and list data structures in R?
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正確答案: B
What is a core deliverable at the end of the analytic project?
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正確答案: D
The graph represents the plot of WSS as a function of K for a K-means clustering analysis you performed. Which point in the graph represents the most optimal value of K?
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正確答案: B
Which key role for a successful analytic project can consult and advise the project team on the value of end results and how these will be used on a day-to-day basis?
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正確答案: D
The web analytics team uses Hadoop to process access logs. They now want to correlate this data with structured user data residing in a production single-instance JDBC database. They collaborate with the production team to import the data into Hadoop.
Which tool should they use?
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Which tool should they use?
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正確答案: B
What should be subtracted to remove a simple linear trend from a time series?
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正確答案: D
Based on the graphic, what should be done to begin addressing chart junk?
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正確答案: C
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?
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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?
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正確答案: D
What is Hadoop?
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正確答案: B
Data has been collected on visitors' viewing habits at a bank's website. Which technique is used to identify pages commonly viewed during the same visit to the website?
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正確答案: A
Which analytic technique would be appropriate to estimate blood pressure based on age and weight?
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正確答案: B
You have the following corpus of texts:
"The cat hit the dog."
"The dog bit the mail carrier."
"The mail carrier chased the truck."
"The truck hit the wall while avoiding the dog that chased the cat."
"The cat climbed the wall."
If the tf-idf metric is used to score relevance for search and retrieval, which term has the highest discriminatory power?
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"The cat hit the dog."
"The dog bit the mail carrier."
"The mail carrier chased the truck."
"The truck hit the wall while avoiding the dog that chased the cat."
"The cat climbed the wall."
If the tf-idf metric is used to score relevance for search and retrieval, which term has the highest discriminatory power?
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正確答案: A