What is Data Science

Question 1

What is ‘Hypothesis-Driven Data Science’?

Answer 1

When you start with a hypothesis and then tries to prove or disprove that with data and evidence you find.

Question 2

What is ‘Problem-Driven Data Science’?

Answer 2

When you start with a hypothesis or problem and then tries to prove or disprove that with data and evidence you find.

Question 3

What is ‘Data-Driven Data Science’?

Answer 3

We have a data set and want to find new insights from that data.

Question 4

What does it mean to ‘Frame the problem’?

Answer 4

To translate the ambiguous problem into a well-defined problem.

And Identify business priorities & strategy decisions that will influence your work

Question 5

What are the steps of processing the data?

Answer 5

Examine Data at High-Level:
- Understand every column; Identify errors, missing values & corrupt records.

Clean the data:
- Throw away, replace, and or filter corrupt/faulty and missing values.

Question 6

What does the step of performing In-Depth Analysis on the data involve?

Answer 6

In-Depth Analysis
Create a predictive model:

Evaluate and Refine Model
- Perhaps return to step of exploring, examining and cleaning the data

Question 7

Definition of data science

Answer 7

Data Science is an application of scientific methods and principles to data processing. - Henrik Strøm

Question 8

Framing the problem is the most important step in Data Science. How do you do it accurately

Answer 8

First of all, make sure you are asking a relevant question.

Put your question is put into a relevant context

Ask if the question can be answered with the resources you have

Question 9

What is the process of collecting raw data?

Answer 9

Identify available datasets and then

extracting to a usable format. e.g .csv

Question 10

What does the process of exploring the data involve?

Answer 10

Play around with the data:
- Split, segment and plot data in different ways.

Identify patterns and Extract features:
- Use statistics to identify & test significant variables.

Question 11

What does the process of communicating the results involve?

Answer 11

Identify Business Insights
- Return back to the business problem

Visualize your findings
-Keep it simple and priority-driven

Tell a clear and actionable story
Effectively communicate to non-technical audiences