20 lines
509 B
JavaScript
20 lines
509 B
JavaScript
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var test = require('tape');
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var ss = require('../');
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function rnd(x) {
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return Math.round(x * 1000) / 1000;
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}
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test('sample_standard_deviation', function(t) {
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test('can get the standard deviation of an example on wikipedia', function(t) {
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t.equal(rnd(ss.sample_standard_deviation([2, 4, 4, 4, 5, 5, 7, 9])), 2.138);
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t.end();
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});
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test('zero-length corner case', function(t) {
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t.equal(rnd(ss.sample_standard_deviation([])), 0);
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t.end();
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});
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t.end();
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});
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