Data Products Project

Approximating A Normal Curve

This presentation describes my Shiny application; an interactive app that allows the user to simulate a normal curve constructed from means taken from random samples of an exponential distribution.

The application interface looks like this;

An example of the user interface code;

shinyUI(fluidPage(
    titlePanel("Inference: Distribution of Means"),
    sidebarLayout(
        sidebarPanel( 
              helpText("Move the slider to see how changing the sizeof the population sample changes the shape of the distribution of means."),
              sliderInput("n",
                    label="Size of Populations",
                    min=5,max=50,step=3,value=25)        
                          ),
         mainPanel(
            plotOutput("plot"),
            textOutput("pop")
            )
    )
))

Conclusions

With the use of a slider widget, the user can select the size ‘n’ of the samples that make the curve. This app primarily functions as an educational aid to help the learner understand inference.

For more information about this app

Go to https://mindmachine.shinyapps.io/Data-Prod/