1. Ungraded quiz
Unit 2

2. Show me your fingers
Do not shout out the answer, or your classmates will follow what you said.
Use your fingers
One finger (the right finger) = A
Two fingers = B
Three fingers = C
Four fingers = D
No finger = I don’t know. I didn’t study

3. Which of the following is untrue?
Business intelligence and data mining are specific applications of data science.
Data science necessitates big data analytics.
Machine learning is a specific application of artificial intelligence.
Data science requires domain knowledge, statistics, computer programming, and database design.

4. Which of the following is not an advantage of data mining?
Most data mining methods are non-parametric
It is data-driven and exploratory, and thus it reduces confirmation bias
It uses resampling-based ensemble methods rather than counting on one single analysis
Unlike the alpha level, the absolute cut-off of data mining methods (e.g. AIC, BIC) is more objective.

5. What are the shortcomings of conventional data?
Sampling bias (e.g. WEIRD)
In experimental setting the participants might behave according to social desirability (e.g. the dictator game)
In survey the respondents might not be able to recall the exact information.
All of the above

6. Which of the following statement is untrue?
By utilizing Google search-term data, the author of “Everybody lies” found that many Americans lied about their criteria for voting
By utilizing Google search-term data, Google researchers developed a highly accurate model for predicting the outbreak of influenza.
Two researchers claimed that a personality model based on Facebook data can accurately predict what people like.
FTC investigated Facebook because Facebook handed over data to Cambridge Analytica without notifying Facebook users.

7. Which of the following is not a component of data science?
Data architecture
Data acquisition
Data analysis
Data ethics

8. Which of the following is not a characteristic of big data?
High volume
High velocity
High variety
High vector

9. Which of the following about data mining is untrue?
Data mining includes mining structured numeric data and unstructured textual data
Data mining utilizes machine learning
Data mining necessitates pattern seeking
Data mining is so named because the insight is buried and thus it takes filtering and extraction to learn about the data.

10. When the data size is extremely huge, it is inefficient to transfer the data from the database server to the analytical system. Which of the following is NOT a solution?
Hodoop
MapReduce
Distributed file system
In-memory analytics