D204 The Data Analytics Journey Study Guide Graded A
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Business
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Business
D204: The Data Analytics Journey Study Guide Graded A+
Data scientists are able to find ______, _________, and _____ in unstructured data.
What is involved in the planning phase?
What is involved in the wrangling phase?
What is involved in the Modeling phase?
What is involved in the Applying p...
Ans: 5. Get data
6. Clean data
7. Explore data
8. Refine data
4). What is involved in the modeling phase?
Ans: 9. Create model
10. Validate model
11. Evaluate model
12. Refine model
5). What is involved in the applying phase?
Ans: 13. Present model
14. Deploy model
15. Revisit model
16. Archive assets
6). ____________________ are programming languages that are very frequently used for data manipulation and
modeling.
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, Ans: Python or R
7). ___________ are general-purpose languages that are used for the back end, the foundational elementsterm-
of data science, and they provide maximum speed.
Ans: C, and C++, and Java
8). ____________________ is a language for working with relational databases to do queries and data manipulat
Ans: SQL
9). What does sql stand for?
Ans: structured query language
10). This is where you actually create the statistical model and you do the linear regression. you do the decisio
tree. you do the deep learning neural network.
Ans: Modeling
11). These are the developers, and the system architects, the people who focus on the hardware and the softw
that make data science possible
Ans: Data engineers
12). This is the phase of collecting data.
Ans: Data acquisition
13). Which phase? - working with stakeholders to help them ask better questions so that both they and you
understand the outcome.
Ans: Discovery
14). What are the 4 parts of data analytics cycle?
Ans: Planning, Wrangling, Modeling and Applying
15).
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, This phase is also known as the discovery phase. during this phase, an analyst defines the major question
interest that need to be answered, understand the needs of the stakeholders, and assess the resource
constraints in the project.
Ans: Business understanding
16). ____________________ is the person who champions the vision of the project and has the authority to allocat
resources.
Ans: The project sponsor
17). __________________ is responsible for making sure things get done on time and within budget and removes
roadblocks.
Ans: Project manager
18). ___________ is when new requirements are added to the project that increases the time/resources needed t
complete it.
Ans: Scope creep
19). What are the 3 types of analysis?
Ans: Descriptive, Predictive, Prescriptive
20). ___________________________ describes the data that is present. mean, median, mode, counting things. how
many of each size and color of shirt were sold in the last month? do we sell more shirts in the summer vs
winter?
Ans: Descriptive analysis
21). ____________________ makes predictions about future state of business. forecasting volumes for example.
based on last summer and winter, what will we sell next year?
Ans: Predictive analytics
22). _______________________ analysis with an end goal of making a recommendation. what colors and sizes of
shirts should we sell to maximize profits?
Ans: Prescriptive analytics
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, 23). ______________________ is just looking at any variable over time
Ans: Time series analysis
24). ____________________ is a programing language that is specific to statistics. it also has capabilities to visua
data.
Ans: R
25). _______________ is a multipurpose programing language that has libraries that extend its capabilities to do
statistical analysis.
Ans: Python
26). ______________________ are platforms that specialize in visualization. this is where you can make graphs an
charts for presentations and data storytelling to executive leaders.
Ans: Tableau and Power BI
27). _______________________ are instant messaging platforms that facilitate in a faster, but less formal, way tha
email.
Ans: Teams, Slack
28). An european union law regulating their citizens must have informed consent and ability to request or delet
their own data that you collect.
Ans: GDPR
29). When the researching organization consciously ignores data that calls their results into question or only
presents one side of the results that puts them in a positive light.
Ans: Conflict of interest
30). Sometimes data might not be available and the analyst will use tools such as web scraping or surveys to
acquire it during which phase?
Ans: Data aquisition
31). The ____________ states that the sampling distribution of the sample means approaches a normal distribut
as the sample size gets larger (if you were to take 50 people out of that population and get the mean, then
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