DEA-7TT2 試験問題を無料オンラインアクセス

Which component of a final presentation focuses on how to deploy the model?
Response:

• A.Approach
• B.Executive summary
• C.Recommendations
• D.Project goals

You have been assigned to do a study of the daily revenue effect of a pricing model of online transactions. You have tested all the theoretical models in the previous model planning stage, and all tests have yielded statistically insignificant results.
What is your next step?
Response:

• A.Report that the results are insignificant, and reevaluate the original business question.
• B.Modify samples used by the models and iterate until a significant result occurs.
• C.Run all the models again against a larger sample, leveraging more historical data.
• D.Move forward on the model with the highest significance scores relative to the others.

In a t-test with unknown variance, what values are used to calculate the t-statistic?
Response:

• A.Sample mean, standard deviation, and sample size
• B.Sample mean, sample standard deviation, and sample size
• C.Mean, standard deviation, and population size
• D.Mean, sample standard deviation, and population size

You have been assigned to perform a study of the daily revenue effect of a pricing model of online transactions. All the data currently available has been loaded into an analytics database.
This data includes revenue data, pricing data, and online transaction dat a. You have completed a thorough univariate analysis of all data and have decided that there are three different models you want to test. Preliminary results show that all models have equally effective results.
What is the next step?
Response:

• A.Develop all three models and perform model selection in the next step of the process
• B.Identify which model the business owner wants and proceed with that model
• C.Prioritize models by complexity and feasibility, and proceed with the most feasible
• D.Select the model that demonstrates the most sophisticated technique and accuracy

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:

• A.Mahout
• B.R
• C.HBase
• D.MADlib