Session 1 of my data analysis course.

1. session#1 Divényi János @divenyi.janos

3. How to find answers
to relevant questions
using data

5. QUESTION

6. QUESTION
DATA

7. QUESTION
DATA
ANALYSIS

8. QUESTION
DATA
ANALYSIS
PRESENTATION

9. QUESTION
DATA
ANALYSIS
PRESENTATION

10. QUESTION
DATA
ANALYSIS
PRESENTATION

13. Prof. Hal Varian
UC Berkeley,
Chief Economist at Google

14. Prof. Hal Varian
UC Berkeley,
Chief Economist at Google
„If you are looking for a career
where your services will be in high
demand, you should find
something where you provide a
scarce, complementary service
to something that is getting
ubiquitous and cheap.”

15. Prof. Hal Varian
UC Berkeley,
Chief Economist at Google
„So what’s getting ubiquitous and cheap?
Data.
And what is complementary to data?
Analysis.”

19. 2014 Dice Tech Salary Survey (17,000 technology proffessionals from the US)

20. b.socrative.com
Student login
into room BMEADAT

21. Personalized sending times

23. How does
a new piece of
information
affects
what we know
about the world?
www.bigstockphoto.com

26. P(A|B)
conditional probability
probability that A occurs
given than B has occurred

27. Explained Visually

28. Problem #1
Mr. Jones has two children.
The older child is a boy. What is the
probability that both children are boys?

29. Problem #1
Mr. Jones has two children.
The older child is a boy. What is the
probability that both children are boys?
1/2

30. Problem #2
Mr. Smith has two children.
At least one of them is a boy. What is the
probability that both children are boys?

31. Problem #2
Mr. Smith has two children.
At least one of them is a boy. What is the
probability that both children are boys?
1/3

32. Problem #3
Mr. Gardner has two children. At least one of
them is a boy born on Tuesday. What is the
probability that both children are boys?

33. Problem #3
Mr. Gardner has two children. At least one of
them is a boy born on Tuesday. What is the
probability that both children are boys?
13/27

34. https://xkcd.com/795/

35. How does
a new piece of
information
affects
what we know
about the world?
www.bigstockphoto.com