Free Dell Data Science Foundations Practice Questions

A.  

Rug plot

B.  

Scatter plot

C.  

Box and whisker plot

D.  

Hexbin plot

A.  

Current deviation from the time series mean depends on the q previous deviations

B.  

Current deviation from the time series mean depends on the quotient q

C.  

Current time series value depends on the q previous values

D.  

Current time series value depends on the fitted polynomial of order q

A.  

If probability > 0.1, then predict the borrower will default

B.  

If probability < 0.1, then predict the borrower will default

C.  

If probability > 0.3, then predict the borrower will default

D.  

If probability < 0.3, then predict the borrower will default

A.  

Excel file

B.  

Clickstream data

C.  

Relational database table

D.  

Comma-separated value file

A.  

Create new combinations of attributes

B.  

Overfit the model to improve prediction accuracy

C.  

Identify the most useful input variables

D.  

Select a superset of variables to shorten training times

A.  

TF and R square

B.  

IDF and information gain

C.  

Information gain and confidence interval

D.  

TF and IDF

A.  

Describe how to implement the model

B.  

Provide talking points to promote or evangelize the project

C.  

Emphasize the business benefits of implementing the model

D.  

Focus on clean simple-to-understand visuals