ch9 Flashcards
1
Q
Big data types?
A
- Structured vs unstructured
- Internal vs external
- Human vs machine generated
2
Q
Two dimensions of big data
A
- Columns or “width” - variables
* Rows or “Length - observations
3
Q
Tall data
A
Many observations, few variables
4
Q
Wide data
A
Few observations, many variables
5
Q
Advantages of big data
A
- Big
- Always on
- Non reactive
6
Q
Disadvantages of big data
A
- Incomplete
- Inaccessible
- Non-representative
- Drifting
- Algorithmically confounded
- Dirty
- Sensitive
7
Q
“Big data hubris”
A
Is the often implicit assumption that big data are a substitute for, rather than a supplement to, traditional data collection and analysis
