Dell E20-007 Exam Questions

Question 6 of 162

Which word or phrase completes the statement? Data-ink ratio is to data visualization as __________ .

Confusion matrix is to classifier

Data scientist is to big data

Seasonality is to ARIMA

K-means is to Naive Bayes

Correct Answer: A

Question 7 of 162

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}
You decide to run the association rules algorithm where minimum support is 50%. Which rule has a confidence at least 50%?

{cheese} => {bread}

{juice} => {cheese}

{milk} => {soda}

{soda} => {milk}

Correct Answer: A

Question 8 of 162

You are using the Apriori algorithm to determine the likelihood that a person who owns a home has a good credit score. You have determined that the confidence for the rules used in the algorithm is > 75%. You calculate lift = 1.011 for the rule, "People with good credit are homeowners". What can you determine from the lift calculation?

Support for the association is low

Leverage of the rules is low

The rule is coincidental

The rule is true

Correct Answer: C

Question 9 of 162

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%?

{bread, milk} => {cheese}

{bread} => {milk}

{juice} => {soda}

{bread} => {cheese}

Correct Answer: A

Question 10 of 162

Under which circumstance do you need to implement N-fold cross-validation after creating a regression model?

There is not enough data to create a test set.

The data is unformatted.

There are missing values in the data.

There are categorical variables in the model.

Correct Answer: A