Brown or blond, all bald
Comparisson of variables. We describe the statistical tests that should be used for comparisson of variables of different kinds.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
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The oddities of small towns
Law of small numbers. The law of small numbers, applying binomial probability, explains the occurrence of Bernouilli events in small samples. I remember when I was a child and went to school that almost everyone had a village to go…
The big family
Probability distributions. Probability distributions frequently used, different to the normal one, are described: Student’s t, chi-square and Snédecor’s F.
Counting sheep
Chi-square homogeneity test. The chi-square homogeneity test compares proportions from various samples to see if they come from the same population.
More than two is a crowd
Analysis of variance (ANOVA). Analysis of variance (ANOVA) is the test used to compare the differences among more than two means of a quantitative variable.