Types of scientific articles we offer:

• Original research paper/article contains results of our own original scientific research.
• Short communication represents a preliminary brief display of the author’s original scientific research results.
• Professional paper processes and displays already known data. It requires the author’s pragmatic side, but it does not imply research originality.
• Conference proceedings, unless they represent a review article, contain new, unpublished results.
• A scientific monograph represents a publication that independently and comprehensively elaborates on a given subject from a domain of some scientific area via methodological procedure appropriate to the topic and accepted in that science.

You can perform statistical tests on data that have been collected in a statistically valid manner – either through an experiment or through observations made using probability sampling methods.

For a statistical test to be valid, your sample size needs to be large enough to approximate the true distribution of the population being studied.

To determine which statistical test to use, you need to know:

• whether your data meets certain assumptions.
• the types of variables that you’re dealing with.

Types of statistical testing:

• Parametric tests assume underlying statistical distributions in the data. Therefore, several conditions of validity must be met so that the result of a parametric test is reliable.
• Nonparametric tests do not rely on any distribution. They can thus be applied even if parametric conditions of validity are not met.