Independence matters
Paired data. When describing and dealing with random variables, we must consider whether they are independent data or paired data.
Evidence Based Medicine pills
Evidence Based Medicine pills
Paired data. When describing and dealing with random variables, we must consider whether they are independent data or paired data.
Hypothesis contrast. Statistical significance. Hypothesis contrast related terms are described: type I error, type II error, power, and statistical significance.
Bilateral vs unilateral testing. We can choose between a bilateral vs unilateral testing. In the second case, we assume the direction of the difference in effect.
Regression to the mean. Regression to the mean explains that, after an extreme value of a variable, the next time we will obtain a value closer to the mean.
Calculating expected values. Calculating expected values is done by multiplying the marginals of the cell and dividing by the total of the table. This rule is reasoned.