>
    <tr>
        <td><h5>stddev()</h5></td>
        <td>Provides the standard deviation value of an array of numbers</td>
        <td>Double</td>
    </tr>
    <tr>
        <td><h5>length()</h5></td>
        <td>Provides the length of an array</td>
        <td>Integer</td>
    </tr>
    <tr>
        <td><h5>sum()</h5></td>
        <td>Provides the sum value of an array of numbers.</td>
        <td>Double</td>
    </tr>
    <tr>
        <td><h5>keys()</h5></td>
        <td>Provides the property keys (An al