Censorship
Survival tables and censored data. We describe the methodology of preparing survival tables and the treatment of censored data in this type of study with time to event variables.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
Category Sin categoría
A case of misleading probability
Bayes’ theorem. We describe the concept of conditional probability and the development of Bayes’ theorem, used to calculate the conditional probability of an event. Today we are going to see another of those examples where intuition about the value of certain…
A simple relationship
Simple regression. The concept of regression is defined and the most used simple regression models are detailed: linear, logistic and proportional hazards regression.
Black sheep
Outliers. Outliers are values that seems inconsistent with the rest of the values, according to the assumed probability model that they follow in the sample.
Do not eat too many pies
The pie chart. A pie chart is a circle whorepresents the total of the data and to each category is assigned an area directly proportional to its frequency. Pies, how good they are! The problem is that, as you know, what is…