Evaluating the evidence: hypothesis testing

Concepts

In this chapter, the fundamental concepts of the contrast of hypotheses will be explored with the aim of identifying the most important elements of this process and recognizing the main variants of interests.

Simulators

What is the null hypothesis?

In a hypothesis test, the compatibility of the data with respect to a hypothesis that we call null hypothesis (H₀) is evaluated. In this application, we show different situations to understand the concept of expected result under H₀.

Elements of a hypothesis test: example of hypotheses about the population mean

This app presents the case of a hypothesis about the value of the population mean. You can observe the expected results under H₀, the concept of power and the importance of the sample size in the evaluation of the results.

Example: test on the value of the difference of two population means

In this app you can explore how the different aspects of the test are calculated about the value of the difference of two population means in the case of a variable with normal distribution.

Evidence in scientific papers

Looking at a paper