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content/DAA/PL - Aula 1.md
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@ -35,7 +35,6 @@
## Percentiles ## Percentiles
There are 3 important percentiles: There are 3 important percentiles:
- 50% - median - 50% - median
- 25% - 1st percentile - 25% - 1st percentile
@ -44,15 +43,15 @@ There are 3 important percentiles:
>[!note]+ >[!note]+
>These 3 percentiles allow the creation of box plot graphs. These specific graphs allow the discovery and presentation of outliers. >These 3 percentiles allow the creation of box plot graphs. These specific graphs allow the discovery and presentation of outliers.
## 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. Covariance is hard to interpret, thus correlation is used instead.
In a dataset, correlations >0.5 are considerable.
>[!caution] Correlation does not mean causation!
## Resource links ## Resource links