Week 2: Data-driven decisions
1. Which of the following statements describes an algorithm?
- A process or set of rules to be followed for a specific task
- A method for recognizing the current problem or situation and identifying the options
- A tool that enables data analysts to spot something unusual
- A technique for focusing on a single topic or a few closely related ideas
2. Fill in the blank: If a data analyst is measuring qualities and characteristics, they are considering _____ data.
- quantitative
- unbiased
- cleaned
- qualitative
3. In data analytics, reports use live, incoming data from multiple datasets; dashboards use static collections of data.
- True
- False
4. A pivot table is a data-summarization tool used in data processing. Which of the following tasks can pivot tables perform? Select all that apply.
- Group data
- Clean data
- Calculate totals from data
- Reorganize data
5. A metric is a single, quantifiable type of data that can be used for what task?
- Setting and evaluating goals
- Defining a problem type
- Cleaning data
- Sorting and filtering data
6. Which of the following options describes a metric goal? Select all that apply.
- Evaluated using metrics
- Indefinite
- Measurable
- Based on theory
7. Fill in the blank: Return on investment compares the _____ of an investment to the net profit gained from that investment.
- success
- purpose
- cost
- timing
8. Fill in the blank: A data analyst is using data to address a large-scale problem. This type of analysis would most likely require _____. Select all that apply.
- small data
- data that reflects change over time
- data represented by a limited number of metrics
- big data
9. Fill in the blank: In data analytics, qualitative data _____. Select all that apply.
- is always time bound
- measures qualities and characteristics
- is subjective
- measures numerical facts
10. Fill in the blank: A _____ is a data-summarization tool used to sort, reorganize, group, count, total, or average data.
- report
- dashboard
- function
- pivot table
11. Fill in the blank: A _____ goal is measurable and evaluated using single, quantifiable data.
- metric
- finite
- conceptual
- benchmark
12. Describe the main differences between big and small data.
- Small data is typically stored and organized in databases. Big data is typically stored and organized in spreadsheets.
- Small data is less useful to data analysts. Big data is more useful to data analysts.
- Small data is specific and concerns a short time period. Big data is less specific and concerns a longer time period.
- Small data has been cleaned and sorted. Big data has not yet been cleaned or sorted.
13. In data analytics, a pattern is defined as a process or set of rules to be followed for a specific task.
- True
- False
14. In data analytics, quantitative data measures qualities and characteristics.
- True
- False
15. In data analytics, reports use data that doesn’t change once it’s been recorded. Which of the following terms describes this type of data?
- Comprehensive
- Real-time
- Monitored
- Static
16. Which data-summarization tool do data analysts use to sort, reorganize, group, count, total, or average data?
- A function
- A pivot table
- A dashboard
- A report
17. A metric is a specific type of data that companies use to identify a problem domain.
- True
- False
18. Fill in the blank: A metric goal is a _____ goal set by a company that is evaluated using metrics.
- finite
- theoretical
- conceptual
- measurable
19. A data analyst is using data from a short time period to solve a problem related to someone’s day-to-day decisions. They are most likely working with small data.
- True
- False
20. If a data analyst compares the cost of an investment to the net profit of that investment over a period of time, they’re analyzing the investment scope.
- True
- False
21. What is an example of using a metric? Select all that apply.
- Using column headers to sort and filter data
- Using annual profit targets to set and evaluate goals
- Using key performance indicators, such as click-through rates, to measure revenue
- Using a pie chart to visualize data
22. Fill in the blank: In data analytics, a process or set of rules to be followed for a specific task is _____.
- a pattern
- a domain
- an algorithm
- a value
23. Fill in the blank: Return on investment compares the cost of an investment to the _____ of that investment.
- purpose
- timing
- net profit
- future success
24. In data analytics, dashboards monitor data that is a continuous source of incoming information. Which of the following terms describes this type of data?
- Comprehensive
- Live
- Filtered
- Sorted