The 90th percentile is a measure of statistical distribution that indicates the value at which 90% of observations in a data set are equal to or below it. To calculate the 90th percentile, you must first organize the data set from least to greatest and identify the number that is in the 90th position in the data set. That number is the 90th percentile.
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The 90th percentile of a dataset is the value that cuts off the first 90 percent of the data values when all of the values are sorted from least to greatest.
This calculator finds the 90th percentile for a given dataset.
Simply enter a list of the comma-separated values for the dataset, then click the “Calculate” button:
Dataset values:
90th percentile: 36.2000
function calc() {
var x = document.getElementById(‘x’).value.split(‘,’).map(Number);
var Q1 = jStat.percentile(x, 0.90);
document.getElementById(‘Q1’).innerHTML = Q1.toFixed(4);
} //end calc function