vault backup: 2023-09-21 10:40:40

content/DAA/PL - Aula 1.md

@@ -4,7 +4,7 @@
 
 -Numerical
 	- Discrete Data ({1,2,3,...})
-	- Continuous Data ()
+	- Continuous Data (\[1, +$\infty$])
 - *Categorical* (binary, languages, ...)
 - **Ordinal** (ratings of 1 to 5)
 
@@ -23,19 +23,18 @@
 
 
 ## Mean, Median & Mode
-- https://en.wikipedia.org/wiki/Average
-- https://en.wikipedia.org/wiki/Median
-- https://en.wikipedia.org/wiki/Mode_(statistics)
+>[!hint]+
+>A **mean** in math is the average of a data set, found by adding all numbers together and then dividing the sum of the numbers by the number of numbers.
 
 ## Standard Deviation & Variance
-- https://en.wikipedia.org/wiki/Standard_deviation
-- https://en.wikipedia.org/wiki/Variance
+
+
 
 ## Probability Density functions
-- https://en.wikipedia.org/wiki/Probability_density_function
+
 
 ## Percentiles
-- https://en.wikipedia.org/wiki/Percentile
+
   
 There are 3 important percentiles:
 - 50% - median
@@ -49,7 +48,20 @@ There are 3 important percentiles:
 ## Covariance & Correlation
 
 >[!hint]+
->Covariance measures the direction of a relationship between two variables, while correlation measures the strength of that relationship.
+>**Covariance** measures the direction of a relationship between two variables, while **correlation** measures the strength of that relationship.
 
+Covariance is hard to interpret, thus correlation is used instead.
+
+
+
+
+## Resource links
+- https://en.wikipedia.org/wiki/Average
+- https://en.wikipedia.org/wiki/Median
+- https://en.wikipedia.org/wiki/Mode_(statistics)
+- https://en.wikipedia.org/wiki/Standard_deviation
+- https://en.wikipedia.org/wiki/Variance
+- https://en.wikipedia.org/wiki/Probability_density_function
+- https://en.wikipedia.org/wiki/Percentile
 - https://en.wikipedia.org/wiki/Covariance
-- 
+- https://en.wikipedia.org/wiki/Correlation