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48 lines
2.5 KiB
HTML
48 lines
2.5 KiB
HTML
<!DOCTYPE html>
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<html>
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<title>Z.TEST Function</title>
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<h1>Z.TEST Function</h1>
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<p>The <b>Z.TEST</b> function is one of the <a href="../UsageInstructions/InsertFunction.htm#statistical" onclick="onhyperlinkclick(this)">statistical functions</a>. It is used to return the one-tailed P-value of a z-test. For a given hypothesized population mean, x, <b>Z.TEST</b> returns the probability that the sample mean would be greater than the average of observations in the data set (array) — that is, the observed sample mean.</p>
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<h3>Syntax</h3>
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<p><b><em>Z.TEST(array, x, [sigma])</em></b></p>
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<p>The <b>Z.TEST</b> function has the following arguments:</p>
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<table style="width: 40%">
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<tr>
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<th style="background-color: #f4f4f4" width="150ch"><b>Argument</b></th>
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<th style="background-color: #f4f4f4"><b>Description</b></th>
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</tr>
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<td><b><em>array</em></b></td>
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<td>The range of numeric values against which to test <b><em>x</em></b>.</td>
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<td><b><em>x</em></b></td>
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<td>The value to test.</td>
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</tr>
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<td><b><em>sigma</em></b></td>
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<td>A population standard deviation. This is an optional argument. If it is omitted, the sample standard deviation is used.</td>
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</tr>
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</table>
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<h3>Notes</h3>
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<p><a href="../UsageInstructions/InsertFunction.htm#applyfunction" onclick="onhyperlinkclick(this)">How to apply</a> the <b>Z.TEST</b> function.</p>
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<h3>Examples</h3>
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<p>The figure below displays the result returned by the <b>Z.TEST</b> function.</p>
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<p><img alt="Z.TEST Function" src="../images/z-test.png" /></p>
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