Sample Questions of DEA-7TT2 Dumps With 100% Exam Passing Guarantee [Q69-Q83]

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Sample Questions of DEA-7TT2 Dumps With 100% Exam Passing Guarantee

Pass Key features of DEA-7TT2 Course with Updated 233 Questions

NEW QUESTION 69
Consider these itemsets:
(hat, scarf, coat)
(hat, scarf, coat, gloves)
(hat, scarf, gloves)
(hat, gloves)
(scarf, coat, gloves)
What is the confidence of the rule (gloves -> hat)?
Response:

75%

60%

66%

80%

NEW QUESTION 70
What is holdout data?
Response:

a subset of the provided data set selected at random and used to validate the model

a subset of the provided data set selected at random and used to initially construct the model

a subset of the provided data set that is removed by the data scientist because it contains data errors

a subset of the provided data set that is removed by the data scientist because it contains outliers

NEW QUESTION 71
There are three criterions for big data analytics projects which include:
– Decision speed
– Analysis flexibility
What is the additional criteria?
Response:

Security

Quality

Throughput

Structure

NEW QUESTION 72
If distributed Item-based Collaborative Filtering is an algorithm supported by Mahout, what is the use case category of the algorithm?
Response:

Classification

Recommenders

Frequent Itemset

Clustering

NEW QUESTION 73
Which word or phrase completes the statement? Data-ink ratio is to data visualization as _________.
Response:

Confusion matrix is to classifier

Data scientist is to big data

Seasonality is to ARIMA

K-means is to Naive Bayes

NEW QUESTION 74
Which key role for a successful analytic project can provide business domain expertise with a deep understanding of the data and key performance indicators?
Response:

Business Intelligence Analyst

Project Manager

Project Sponsor

Business User

NEW QUESTION 75
A fair six-sided die is rolled. Let A denote the event that an odd number is rolled. Let C denote the event that a 1, 2, or 3 is rolled. What is the value of the conditional probability, P(C|A)?
Response:

2/3

1/2

1/3

1/4

NEW QUESTION 76
Which two analytical methods can be used for dealing with categorical variables with a large number of levels?
Response:

Naive Bayesian and Decision Tree

Linear Regression and Association Rules

Logistic Regression and ARMA

Naive Bayesian and Linear Regression

NEW QUESTION 77
What does a leaf node represent in a decision tree?
Response:

Root of the decision tree

Decision point on a variable

Outcome of a test on a variable

Assigned class label

NEW QUESTION 78
In addition to quantitative and technical skills, what is a key aspect of the profile of a data scientist?
Response:

Accounting and regulatory skills

Project management and administrative skills

Proficient in Microsoft Project and Excel

Curious and creative

NEW QUESTION 79
You have been assigned to do a study of the daily revenue effect of a pricing model of online transactions. All the data currently available to you has been loaded into your analytics database; revenue data, pricing data, and online transaction data.
You find that all the data comes in different levels of granularity. The transaction data has timestamps (day, hour, minutes, seconds), pricing is stored at the daily level, and revenue data is only reported monthly.
What is your next step?
Response:

Report back to the business owner that the current data model does not support the business question.

Interpolate a daily model for revenue from the monthly revenue data.

Aggregate all data to the monthly level in order to create a monthly revenue model.

Disregard revenue as a driver in the pricing model, and create a daily model based on pricing and transactions only.

NEW QUESTION 80
What is an appropriate data visualization to use in a presentation to a project sponsor?
Response:

Bar Chart

Pie Chart

Box and Whisker Plot

Density Plot

NEW QUESTION 81
You have been assigned to run a linear regression model for each of 5, 000 distinct districts, and all the data is currently stored in a PostgreSQL database. Which tool/library would you use to produce these models with the least effort?
Response:

MADlib

Mahout

HBase

NEW QUESTION 82
What is a key consideration when preparing a presentation intended for sponsors?
Response:

Describe how current processes may be affected

Provide details on model planning and building

Describe how to implement the model

Emphasize the business benefits of implementing the model

NEW QUESTION 83
You have been assigned to run a logistic regression model for each of 100 countries, and all the data is currently stored in a PostgreSQL database. Which tool/library would you use to produce these models with the least effort?
Response:

MADlib

Mahout

RStudio

HBase

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To prepare for the EMC DEA-7TT2 certification exam, candidates can take advantage of the various training resources available online. These resources include study guides, practice exams, and other online courses. Many organizations offer training programs that help candidates prepare for the exam and advance their careers in data science and analytics.

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