Please enable JavaScript.

Coggle requires JavaScript to display documents.

Week 1 (concepts (Types of Data Analysis (Descpriptive analytics…

- - - - Discrete
        
        only integer numbers. (eg. number of people in a house, number of times you've been to the doctor in the last month.)
      - Continuous
        
        eg. height, unemployment rate, GDP
- - - - these probabilities are known as marginal probabilities
      - In each statement we are focusing only on one of the characteristics of interest
      - Marginal probabilities are written mathematically as P=x
    - - Mathematically written as P(Diabetes ∩ Minimal Exercise) = 0.0292.
      - • The “∩” symbol means ‘intersection’.
    - - Conditional probabilities are written as follows: P(Diabetes | Minimal Exercise) = 0.0454.
      - The “|” symbol means ‘conditional upon’ or ‘given’.
  - - - The first one was showed above. P(A|B) = P(A)
      - Second one is P(A ∩ B) = P(A)P(B)
        
        That is, two events are independent if the probability of their intersection
        equals the product of their marginal probabilities.
        
        P(Minimal Exercise ∩ Diabetes) = 0.0292 P(Minimal Exercise) = 0.6432 P(Diabetes) = 0.0404
        
        Since 0.0292 ̸= 0.6432 × 0.0404 = 0.0260, we conclude that the events are NOT independent as before.