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content/DAA/PL - Aula 1.md
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-Numerical -Numerical
- Discrete Data ({1,2,3,...}) - Discrete Data ({1,2,3,...})
- Continuous Data () - Continuous Data (\[1, +$\infty$])
- *Categorical* (binary, languages, ...) - *Categorical* (binary, languages, ...)
- **Ordinal** (ratings of 1 to 5) - **Ordinal** (ratings of 1 to 5)
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## Mean, Median & Mode ## Mean, Median & Mode
- https://en.wikipedia.org/wiki/Average >[!hint]+
- https://en.wikipedia.org/wiki/Median >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.
- https://en.wikipedia.org/wiki/Mode_(statistics)
## Standard Deviation & Variance ## Standard Deviation & Variance
- https://en.wikipedia.org/wiki/Standard_deviation
- https://en.wikipedia.org/wiki/Variance
## Probability Density functions ## Probability Density functions
- https://en.wikipedia.org/wiki/Probability_density_function
## Percentiles ## Percentiles
- https://en.wikipedia.org/wiki/Percentile
There are 3 important percentiles: There are 3 important percentiles:
- 50% - median - 50% - median
@ -49,7 +48,20 @@ There are 3 important percentiles:
## Covariance & Correlation ## Covariance & Correlation
>[!hint]+ >[!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/Covariance
- - https://en.wikipedia.org/wiki/Correlation