回答編集履歴
1
実際にsimple-statisticsで平均・標準偏差・偏差値を計算したものを追記
answer
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@@ -16,4 +16,38 @@
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他、以下など参考にしてみてください
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https://www.monotalk.xyz/blog/Find-variance-standard-deviation-z-score-deviation-value-in-JavaScript-library-simple-statistics/
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https://www.monotalk.xyz/blog/Find-variance-standard-deviation-z-score-deviation-value-in-JavaScript-library-simple-statistics/
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```html
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<!DOCTYPE html>
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<html lang="ja" dir="ltr">
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<head>
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<meta charset="utf-8" />
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<meta http-equiv="Content-Type" content="text/html; charset=shift_jis" />
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<script src="https://unpkg.com/simple-statistics@7.7.0/dist/simple-statistics.min.js"></script>
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<title></title>
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</head>
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<body>
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<script>
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var x = [
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65, 73, 42, 81, 60, 75, 62, 53, 69, 77, 83, 65, 72, 65, 81, 66, 69, 73,
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88, 53,
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35
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];
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var mean = ss.mean(x);
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var s = ss.standardDeviation(x);
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38
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var hensa = (10 * (81 - mean)) / s + 50;
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document.write('平均：' + mean);
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document.write('<br>');
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document.write('標準偏差：' + s);
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document.write('<br>');
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for (score of x) {
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var d = (10 * (score - mean)) / s + 50;
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document.write('得点' + score + 'の偏差値：' + d + '<br>');
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}
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</script>
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</body>
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</html>
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53
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```
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