Statistical Inference for One Population Standard Deviation (left panel ONLY)

[ashokkrish]

@samantha-v-brian

When the user selects

Currently there are two parameters of interest to choose from

I would like to add another parameter of interest to this list and make it look like this

It can be achieved by the following code

                radioButtons(
                  inputId      = "popuParameter",
                  label        = strong("Parameter of Interest"),
                  choiceValues = list("Population Mean", 
                                      "Population Standard Deviation", 
                                      "Population Proportion"),
                  choiceNames  = list("Population Mean (\\( \\mu \\)) ", 
                                      "Population Standard Deviation (\\( \\sigma \\)) ", 
                                      "Population Proportion (\\( p\\))"),
                  selected     = "Population Mean", #character(0), #
                  inline       = FALSE), #,width = '1000px'),

Now suppose the user selects

We should have two numericInputs called

Sample Size (n) Population Standard Deviation (σ)

Validate the above two fields:

• Sample Size cannot be empty, it has to be a positive integer greater than zero.
• Population Standard Deviation cannot be empty, it has to be a positive value (decimals allowed) greater than zero.

Next we will have a radio button toggle as follows

In the user selects Confidence Interval then display the following Confidence Level choices

In the user selects Hypothesis Testing then display the following

Followed by a numericInput for

Hypothesized Population Mean (σ0) Value

Following that have this

[sam-vb]

Hi Ashok! I've added the Population Standard Deviation radio button, as well as conditional panels for Sample Size (n) and Population Standard Deviation (σ). The conditional panels for Inference Types are both functioning per Mike Meyer's previous work.

Can you expand more on the Hypothesized Population Mean value? Additionally, is there a document I can refer to for sample values/formulas/calculations so I can test these new additions?

[ashokkrish]

@samantha-v-brian

Hi Sam,

Thanks for working on this issue. Here are some follow-up requests on this same issue.

• I made a mistake in the header of one of the numericInputs, can you change to Sample Standard Deviation (s)?
• Set a default value for as 30.
• Set a default value for Sample Standard Deviation (s) as 12.23.
• Italicize
• If either of these two fields are left blank and the user clicks the Calculate button

Display the following messages

• Here is a test case for a 90% confidence interval

On the mainPanel after all the validation checks out we will print the answer showing all the steps. For now if you can fix the above requests and push the code that'd great.

[ashokkrish]

For the radioButton could you set inline = FALSE? This will set the options as follows

[sam-vb]

Hi Ashok!

The above requests have been fixed. I also added main panel error messages for Sample Size Estimation per the task on Google Docs, as I'd missed them previously when implementing validation.

EDIT: commented just as you added the inline request! Will fix right now

EDIT: Fixed and pushed

[ashokkrish]

I am sorry about a minor confusion and it is entirely my fault,

In the radioButton choices it should be (this needs a fix)

but the numericInput should be (which is correct now)

In other words Population Standard Deviation is the Parameter of Interest and the Sample Standard Deviation is its point estimate.

[sam-vb]

Not a problem, it was an easy fix. I've pushed the change.