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                      Manually enter numerical data, up to 5 columns:
                      

                      

                      

                    

                    

                      

                      Original Data
                      

                      Transformed Data
                      

                    

                  

                

                

                

                
              

            

          

        

        

          

            
            

              

                
              

              

                

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                

                
              

            

          

        

        

          

            
            

              

                
              

              

                

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                

                
              

            

          

        

        

          

            
            

              

                
              

              

                

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                

                
              

            

          

        

        

          

            
            

              

                
              

              

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                

                
              

            

          

        

        

          

            
            

              

                
              

              

                

                

                  

                

                

                  

                

                

                  

                

                

                

                
              

            

          

        

        

          

            

              

                
              

              

                

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                

                
              

            

          

        

        

          

            

              

                
              

              

                

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                

                
              

            

          

        

        

          

            

              

                
              

              

                

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                  

                

                

                

                
              

            

          

        

        

          

          
About this app


Funded by an FPDC (2021 - 2022) grant, this web app is built by Xuemao Zhang.  The goal of the app is to promote students’ interest in R programming while learning introductory statistics.  Installation and configuration are not needed as a web-based application.  Students interested in coding can copy the R code in the app and paste to the R workspace installed on their PC or Mac to reproduce the data analysis results.  However, the functionality is point-and-click so those uninterested in coding will not be intimidated by the features. The app was intended for students in all PASSHE (PA State System of Higher Education) schools to use.  It is expected to be adopted by more undergraduate universities.  Please contact me xzhang2@esu.edu if you have any suggestions or ideas to improve this web app.


DO NOT upload sensitive data to the app since security considerations have not been addressed yet.


Some R packages are used in this app for statistical data analyses.  If you are interested in R programming, please install these packages by pasting install.packages(c("car","BSDA","datarium","dplyr","EnvStats","ggplot2", "rstatix")) to the R console after R is installed on your computer.


Structure of the app


The app has the following six menus:
 


    

  • Distributions
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  • Probability Calculation     Probability calculations for some discrete and continuous distributions including Finite distribution, Binomial distribution, Poisson distribution, Normal distribution, Student-t distribution, Chi-square distribution and F distribution.
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  • Quantile Calculation     Calculating quantiles/percentiles for Normal distribution, Student-t distribution, Chi-square distribution and F distribution.
 
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  • Inferences
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  • Statistics   Confidence interval estimation and hypothesis testing when summary statistics of a sample data are given.
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  • Data    Confidence interval estimation and hypothesis testing when sample data are is given.  The data must be manually entered.
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            The following four menus will allow users to perform basic data analyses and statistical routines after a dataset is uploaded.


    

  • Data Import
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  • Users can upload or manually enter data (up to 5 variables), transform variables in the data, and download the data set.   Only .csv (comma-separated values) format files are accepted by the app when a data set is to be uploaded.
    
 
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  • Univariate
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  • Numerical Data Analysis    Users can describe a single numerical variable with graphs and numerical summaries, and conduct statistical inferences about population means and variances.
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  • Categorical Data Analysis    Users can describe a single categorical variable with graphs and numerical summaries, and conduct statistical inferences about population proportions.
 
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  • Multivariate
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  • SLR Model    Users use scatter plot and the simple linear regression model to describe the relationship between two numerical variables.
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  • MLR Model   Users study the relationship between a response variable and a set of explanatory variables using polynomial regression model, multiple linear regression model, or the logistic regression model.
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  • Contingency Analysis Users investigate the dependence between two categorical variables by contingency analysis.
 
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  • ANOVA
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  • One-way ANOVA   The one-way ANOVA (analysis of variance) is used to determine whether there are any statistically significant differences between the means of three or more independent (unrelated) groups.
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  • Two-way ANOVA   The two-way ANOVA is used to understand if there is an interaction between the two independent factors on the numerical response variable, and compare the factor levels or combination of factor levels if no significant interaction exists.
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Main techs used in this app