Evidence Based Medicine pills
Evidence Based Medicine pills
Graphical representation of qualitative variables. Two of the most used graphs for qualitative variables are described: the pie chart and the bar chart. Pareto’s graph is also mentioned. When you read the title of this post, you can ask yourself with what…
Measures of dispersion with qualitative variables Measures of dispersion of qualitative variables are described: Blau’s index, qualitative variation index, Teachman’s index and ratio of variation. I don’t like the end of summer. The days with bad weather begin, I wake up completely…
The meaning of p-value. The meaning of p-value is the probability of obtaining a value equal to or more distant from the equality of effect given that the null hypothesis is true.
Pitfalls of statistics. Some of the inappropriate uses of statistics are described, either due to ignorance or to modify the apparent relevance of the results.
The choice of the statistical test. The most suitable statistical test is described according to the type of variable, whether or not it is paired data and follow normal distribution. The most common situations will be those of comparison of means,…