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<h1>POISSON.DIST Function</h1>
<p>The <b>POISSON.DIST</b> function is one of the statistical functions. It is used to return the Poisson distribution; a common application of the Poisson distribution is predicting the number of events over a specific time, such as the number of cars arriving at a toll plaza in 1 minute.</p>
<p>The <b>POISSON.DIST</b> function syntax is:</p>
<p style="text-indent: 150px;"><b><em>POISSON.DIST(x, mean, cumulative)</em></b></p>
<p><em>where</em></p>
<p style="text-indent: 50px;"><b><em>x</em></b> is the number of events, a numeric value greater than 0.</p>
<p style="text-indent: 50px;"><b><em>mean</em></b> is the expected numeric value greater than 0.</p>
<p style="text-indent: 50px;"><b><em>cumulative</em></b> is the form of the function, a logical value: TRUE or FALSE. If <b><em>cumulative</em></b> is TRUE, the function will return the cumulative Poisson probability; if FALSE, it will return the Poisson probability mass function.</p>
<p>The values can be entered manually or included into the cell you make reference to.</p>
<p>To apply the <b>POISSON.DIST</b> function,</p>
<ol>
<li>select the cell where you wish to display the result,</li>
<li>click the <b>Insert function</b> <img alt="Insert Function icon" src="../images/insertfunction.png" /> icon situated at the top toolbar,
<br />or right-click within a selected cell and select the <b>Insert Function</b> option from the menu,
<br />or click the <img alt="Function icon" src="../images/function.png" /> icon situated at the formula bar,
</li>
<li>select the <b>Statistical</b> function group from the list,</li>
<li>click the <b>POISSON.DIST</b> function,</li>
<li>enter the required arguments separating them by commas,</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="POISSON.DIST Function" src="../images/poisson-dist.png" /></p>
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