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web-apps/apps/spreadsheeteditor/main/resources/help/it/Functions/z-test.htm

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<!DOCTYPE html>
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<title>Z.TEST Function</title>
<meta charset="utf-8" />
<meta name="description" content="" />
<link type="text/css" rel="stylesheet" href="../editor.css" />
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<link type = "text/css" rel = "stylesheet" href = "../../images/sprite.css" />
Added help translations (IT), old translations replaced with en version
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<script type="text/javascript" src="../callback.js"></script>
<script type="text/javascript" src="../search/js/page-search.js"></script>
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<div class="mainpart">
<div class="search-field">
<input id="search" class="searchBar" placeholder="Search" type="text" onkeypress="doSearch(event)">
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<h1>Z.TEST Function</h1>
<p>The <b>Z.TEST</b> function is one of the statistical functions. 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>
<p>The <b>Z.TEST</b> function syntax is:</p>
<p style="text-indent: 150px;"><b><em>Z.TEST(array, x [, sigma])</em></b></p>
<p><em>where</em></p>
<p style="text-indent: 50px;"><b><em>array</em></b> is the range of numeric values against which to test <b><em>x</em></b>.</p>
<p style="text-indent: 50px;"><b><em>x</em></b> is the value to test.</p>
<p style="text-indent: 50px;"><b><em>sigma</em></b> is a population standard deviation. This is an optional argument. If it is omitted, the sample standard deviation is used.</p>
<p>The values can be entered manually or included into the cell you make reference to.</p>
<p>To apply the <b>Z.TEST</b> function,</p>
<ol>
<li>select the cell where you wish to display the result,</li>
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<li>click the <b>Insert function</b> <div class = "icon icon-insertfunction"></div> icon situated at the top toolbar,
Added help translations (IT), old translations replaced with en version
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<br />or right-click within a selected cell and select the <b>Insert Function</b> option from the menu,
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<br />or click the <div class = "icon icon-function"></div> icon situated at the formula bar,
Added help translations (IT), old translations replaced with en version
2020-04-29 13:05:40 +00:00
</li>
<li>select the <b>Statistical</b> function group from the list,</li>
<li>click the <b>Z.TEST</b> function,</li>
<li>enter the required arguments separating by commas or select a range of cells with the mouse,</li>
<li>press the <b>Enter</b> button.</li>
</ol>
<p>The result will be displayed in the selected cell.</p>
<p style="text-indent: 150px;"><img alt="Z.TEST Function" src="../images/z-test.png" /></p>
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