Data review

Why is cleaning data important?

• It ensures incomplete data does not hide or skew results.

• It removes bad or incomplete data.

• It repairs bad or incomplete data.

• All the above

Why is analyzing big data important?

• To test due diligence

• To verify existing solutions to problems

• To increase the viability of server farms

• To identify patterns that humans cannot see

Collaboration can provide

• duplication of effort

• clean data

• insights we may never discover otherwise

• several points of failure

Information about the author of a document is

• maxdata

• metadata

• context

• content

Being able to add or remove resources to store large data sets is called

• scalability

• filtering

• efficiency

• routing

Providing someone read-only access to data is an example of

• ciphering

• encryption

• privacy

• security

Which data compression technique provides the most compression?

• Lossy

• Lossless

• Filtering

• Classification

9. A company purchases a large block of data from a social media site. If they want to analyze the data to learn more about potential customers, what techniques should they use?

• Data processing to use the data with existing company software to see if it will run on their systems or if new ones will need to be developed

• Maximization to get the highest return on their purchase of the data

• Data mining to identify patterns and relationships in the data for further analysis

• Modeling to test different hypotheses about what data could be present

10. A magnet school wants to advertise their students' success taking AP exams to prospective families. What's the best method to share the summarized data?

• Send an email to families with middle-school-age children.

• Create an interactive pie chart that can drill down to topics and overall scores posted on the school's website.

• Write a report for a marketing pamphlet.

• Post an image of student results on social media sites.

Which topic needs data mining to resolve?

• The standardized test scores for current students compared to all other test scores across the country for the past decade

• The average number of students who drive to school each day

• The number of library books that need to be replaced each year

• The record of wins and losses for all sports teams under their current coaches compared to prior years' win/loss records