A Chi-Square Critical Value is the value of the chi-square statistic that must be exceeded in order for a null hypothesis to be rejected. This value is calculated using the degrees of freedom and the desired level of confidence. It is used to evaluate the relationship between two categorical variables.
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X2 critical value = 22.36203
function calc() {
//get input values
var p = +document.getElementById(‘p’).value;
var df = +document.getElementById(‘df’).value;
//calculate critical value
var x2 = jStat.chisquare.inv(1-p, df);
//output probabilities
document.getElementById(‘x2’).innerHTML = x2.toFixed(5);
}