Aturan kalkulator jempol
Aturan praktisnya , terkadang disebut aturan 68-95-99.7, menyatakan bahwa untuk kumpulan data tertentu dengan distribusi normal:
68% nilai data berada dalam satu standar deviasi mean.
95% nilai data berada dalam dua standar deviasi dari mean.
99,7% nilai data berada dalam tiga standar deviasi mean.
Untuk menerapkan aturan praktis pada kumpulan data tertentu, cukup masukkan mean dan deviasi standar kumpulan data tersebut ke dalam kotak di bawah, lalu klik tombol “Hitung”.
function calc() {
//get input data var pop_mean = document.getElementById('pop_mean').value*1; var pop_sd = document.getElementById('pop_sd').value*1;
//output values document.getElementById('one').innerHTML = "Approximately 68% of data values lie between " + (pop_mean-(pop_sd*1)).toFixed(3) + " and " + (pop_mean-(-pop_sd*1)).toFixed(3) + ""; document.getElementById('two').innerHTML = "Approximately 95% of data values lie between " + (pop_mean-(pop_sd*2)).toFixed(3) + " and " + (pop_mean-(-pop_sd*2)).toFixed(3) + ""; document.getElementById('three').innerHTML = "Approximately 99.7% of data values lie between " + (pop_mean-(pop_sd*3)).toFixed(3) + " and " + (pop_mean-(-pop_sd*3)).toFixed(3) + ""; }