On the other hand, the application contains a calculator that will estimate the sample size for a proportion, mean and hypothesis (rate and mean) and estimate the confidence interval for amean, difference of two means, for a ratio and to compare two proportions.
Therefore, it is differentiated into two parts the first one explains a theory of the proof that is going to be used and the second one provides a simple guide to run it with the SPSS statistical program.
Its aim is to help the researcher to choose the right test for statistical analysis. Although it is especially designed for health sciences, it can be used by any user who needs to make a research. App4stats is an application aimed to all those people who need to use biostatistics in their daily work.
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