A time series of monthly sales indicates a periodic pattern, and the value reaches the peak every December.
Which statistic needs to be subtracted from the actual value to adjust for this seasonal effect?

• A.Mean value of sales over the whole time series
• B.Average value for each month over a few years
• C.Mean value of sales within each year
• D.Least-squares-fit line of the series

Comment: *

Name: *

Email: *

Verification: *

In addition to quantitative and technical skills, what is a key aspect of the profile of a data scientist?

• A.Accounting and regulatory skills
• B.Proficient in Microsoft Project and Excel
• C.Project management and administrative skills
• D.Curious and creative

Comment: *

Name: *

Email: *

Verification: *

What is a key consideration when preparing a presentation intended for sponsors?

• A.Describe how current processes may be affected
• B.Emphasize the business benefits of implementing the model
• C.Describe how to implement the model
• D.Provide details on model planning and building

Comment: *

Name: *

Email: *

Verification: *

Your customer provided you with 2, 000 unlabeled records and asked you to separate them into three groups.
What is the correct analytical method to use?

• A.Logistic regression
• B.K-means clustering
• C.Linear regression
• D.Naive Bayesian classification

Comment: *

Name: *

Email: *

Verification: *

Your risk analysis team has access to new customer financial data. You want to use this data to improve your prediction of credit default. Previously, the team was using only credit bureau scores, loan size, and customer income to assess risk of default.
What is the null hypothesis that should be used to evaluate the model?

• A.New model predicts as well as the toss of a coin weighted by the average default rate
• B.New model predicts better than the toss of a coin weighted by the average default rate
• C.Model using the new financial data predicts the outcome just as well as the previous model
• D.Model using the new financial data predicts the outcome better than the previous model

Comment: *

Name: *

Email: *

Verification: *