91df817cfe
* fix(guide) add stubs and correct file path misspellings and pr… (#36528) * fix: corrected file path to match curriculum * fix: renamed to newer challenge name * fix: added solutions to articles from challenge files * fix: added missing .english to file name * fix: added missing title to guide article * fix: correct solution for guide article * fix: replaced stub with hint * fix: added space in Hint headers * fix: added solution to guide article * fix: added solution to guide article * test: replaced stub with hint and solution * fix: add Problem number: to title * fix: changed generatorexponential to correct name * fix: renamed knight's tour to knights-tour * fix: updated guide article
26 lines
443 B
Markdown
26 lines
443 B
Markdown
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title: Cumulative standard deviation
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---
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# Cumulative standard deviation
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---
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## Solutions
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<details><summary>Solution 1 (Click to Show/Hide)</summary>
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```javascript
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function standardDeviation(arr) {
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var sum = 0,
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sum_sq = 0,
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n = arr.length;
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arr.forEach(function(e) {
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sum += e;
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sum_sq += e * e;
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})
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var std_dev=Math.sqrt((sum_sq / n) - Math.pow(sum / n, 2))
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return Math.round(std_dev*1000)/1000;
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}
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```
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</details> |