Get all latest (August) EMC E20-007 Actual Test 101-110

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QUESTION 101

What is required in a presentation for business analysts?

 

A.

Budgetary considerations and requests

B.

Operational process changes

C.

Detailed statistical explanation of the applicable modeling theory

D.

The presentation author’s credentials

 

Correct Answer: B

 

 

QUESTION 102

You are using MADlib for Linear Regression analysis

. Which value does the statement return?

 

SELECT (linregr(depvar, indepvar)).r2 FROM zeta1;

 

A.

Goodness of fit

B.

Coefficients

C.

Standard error

D.

P-value

 

Correct Answer: A

 

 

QUESTION 103

Trend, seasonal, and cyclical are components of a time series. What is another component?

 

A.

Irregular

B.

Linear

C.

Quadratic

D.

Exponential

 

Correct Answer: A

 

 

QUESTION 104

When would you use a Wilcoxson Rank Sum test?

 

A.

When you cannot make an assumption about the distribution of the populations

B.

When the data can easily be sorted

C.

When the populations represent the sums of other values

D.

When the data cannot easily be sorted

 

Correct Answer: A

 

 

QUESTION 105

Consider a database with 4 transactions:

 

Transaction 1: {cheese, bread, milk}

 

Transaction 2: {soda, bread, milk}

 

Transaction 3: {cheese, bread}

 

Transaction 4: {cheese, soda, juice}

 

The minimum support is 25%. Which rule has a confidence equal to 50%?

 

A.

{bread, milk} => {cheese}

B.

{bread} => {milk}

C.

{juice} => {soda}

D.

{bread} => {cheese}

 

Correct Answer: A

 

 

QUESTION 106

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?

 

A.

There is a 3% chance that you have identified a difference between the populations when in reality there is none.

B.

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.

C.

There is a 3% chance that a sample group from population A will score 10 points higher that a sample group from population B.

D.

There is a 97% chance that a sample group from population A will score 10 points higher that a sample group from population B.

 

Correct Answer: A

 

 

QUESTION 107

Which method is used to solve for coefficients b0, b1, .., bn in your linear regression model:

 

Y = b0 + b1x1+b2x2+….+bnxn

 

A.

Ordinary Least squares

B.

Apriori Algorithm

C.

Ridge and Lasso

D.

Integer programming

 

Correct Answer: A

QUESTION 108

Refer to the exhibit. Consider the training data set shown in the exhibit. What are the classification (Y = 0 or 1) and the probability of the classification for the tupleX(0, 0, 1) using Naive Bayesian classifier?

 

clip_image002

 

A.

Classification Y = 1, Probability = 4/54

B.

Classification Y = 0, Probability = 1/54

C.

Classification Y = 1, Probability = 1/54

D.

Classification Y = 0, Probability = 4/54

 

Correct Answer: A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

QUESTION 109

Refer to the exhibit. In the exhibit, a correlogram is provided based on an autocorrelation analysis of a sample dataset. What can you conclude based only on this exhibit?

 

clip_image004

 

A.

There appears to be no structure left to model in the data

B.

There appears to be a seasonal component in the data

C.

Lag 1 has a significant autocorrelation

D.

There appears to be a cyclical component in the data

 

Correct Answer: A

 

 

 

 

 

 

 

 

 

 

QUESTION 110

Refer to the exhibit. Click on the calculator icon in the upper left corn

er. An analyst is searching a corpus of documents for the topic “solid state disk”. In the Exhibit, Table A provides the inverse document frequency for each term across the corpus. Table B provides each term’s frequency in four documents selected from corpus. Which of the four documents is most relevant to the analyst’s search?

 

clip_image006

 

A.

Document C

B.

Document A

C.

Document B

D.

Document D

 

Correct Answer: A

 

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