You’ll find here some R notebooks I made to remind me of good practices in statistical analysis, data manipulation and data visualization. I share them in the hope that they will be useful to you too, fellow apprentice statistician.

###### AttrakDiff data generation and analysis

How to analyze AttrakDiff data?

*Standardized questionnaire, Data generation, Confidence intervals*

###### Association between two independent nominal variables

Is there an association between two nominal variables?

*Pearson’s Chi-squared test, Fisher’s Exact Test*

###### Distribution follows a theoretical distribution

Is the distribution of subjects in different categories faithful to a theoretical distribution?

*Chi-squared test for given probabilities*

###### Mean differ from a value

Does the population mean or median differ from a predefined value?

*One Sample t-test, Wilcoxon signed rank test*

###### Means differ in two independant groups

Do these two groups differ?

*Two Sample t-test, Welch Two Sample t-test*

###### Means differ in two paired groups

Is this treatment effective?

*Paired t-test, Wilcoxon signed rank test*