JavaScript Program for Inverse t Distribution Calculator
In this article, we will discuss the Inverse t Distribution Calculator using JavaScript. An inverse t-distribution calculator is a valuable tool for calculating critical values from the t-distribution. It helps researchers and analysts in hypothesis testing, confidence interval estimation, and other statistical calculations.
Using jStat library
- In this approach, we are using jStat library which has built-in functions.
- We are creating a function that takes input of probability and degree of freedom from the form of HTML.
- We are using ‘jStat.studentt.inv’ function for calculating the inverse t distribution.
Example: This example shows the use of the above-explained approach.
HTML
<!DOCTYPE html> < html lang = "en" > < head > < meta charset = "UTF-8" > < meta name = "viewport" content = "width=device-width, initial-scale=1.0" > < title >Inverse t-Distribution Calculator</ title > < script src = "https://cdnjs.cloudflare.com/ajax/libs/jstat/1.7.1/jstat.min.js" > </ script > </ head > < body > < h1 >Inverse t-Distribution Calculator</ h1 > < form > < label for = "prob" >Probability (p):</ label > < input type = "number" id = "prob" step = "0.01" min = "0" max = "1" required> < br > < label for = "dof" >Degrees of Freedom (DOF):</ label > < input type = "number" id = "dof" required> < br > < button type = "button" onclick = "inverseT()" > Calculate </ button > </ form > < div id = "result" ></ div > < script > function fun(p, DOF) { if (p < 0 || p > 1) { return "Probability value (p) must be between 0 and 1."; } const result = jStat.studentt.inv(p, DOF); return result; } function inverseT() { const probInput = document.getElementById("prob"); const DOF = document.getElementById("dof"); const ans = document.getElementById("result"); const prob = parseFloat(probInput.value); const dof = parseInt(DOF.value); const inverseT = fun(prob, dof); if (typeof inverseT === 'number' && !isNaN(inverseT)) { ans.textContent = `Inverse t-distribution for p=${prob} and DOF=${dof}: ${inverseT}`; } else { ans.textContent = inverseT; } } </ script > </ body > </ html > |
CSS
body { font-family : Arial , sans-serif ; text-align : center ; } h 1 { color : #333 ; } form { margin : 20px auto ; padding : 20px ; border : 1px solid #ccc ; width : 300px ; background-color : #f7f7f7 ; } label { display : block ; margin-bottom : 10px ; } input[type= "number" ] { width : 100% ; padding : 5px ; margin-bottom : 10px ; } button { background-color : #4CAF50 ; color : white ; border : none ; padding : 10px 20px ; cursor : pointer ; } button:hover { background-color : #45a049 ; } #result { margin-top : 20px ; font-weight : bold ; padding : 10px ; border : 1px solid #ccc ; background-color : #f0f0f0 ; color : #4CAF50 ; } |
Output:
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