PHP | stats_variance() Function

PHP stats_variance() Function


Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP stats_variance() Function.

The PHP stats_variance() function returns the variance.

Syntax

Following below is the syntax to use this function -

float stats_variance( array $a [, bool $sample = false ] )


Parameter Details

Sr.NoParameterDescription
1

a

The array of data to find the standard deviation for. Note that all values of the array will be cast to float

2

sample

Indicates if a represents a sample of the population; defaults to false.


Return Value

This built-in function returns the variance of values in a, or false on failure.

Dependencies

This built-in function was first introduced in statistics extension (PHP version 4.0.0 and PEAR v1.4.0). In this tutorial guide, we used the latest release of stats-2.0.3 (PHP v7.0.0 or newer and PEAR version 1.4.0 or newer).

Example

The below example computes the variance of values in a -

<?php
   $a=array(5,7,8,10,10);
   var_dump(stats_variance($a));
   var_dump(stats_variance($a, true));
?>

Output

When the above code is executed, it will produce the following result -

float(3.6) 
float(4.5)


Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we will be studying about the PHP String Functions.

Feel free to ask your questions where necessary and we will attend to them as soon as possible. If this tutorial was helpful to you, you can use the share button to share this tutorial.

Follow us on our various social media platforms to stay updated with our latest tutorials. You can also subscribe to our newsletter in order to get our tutorials delivered directly to your emails.

Thanks for reading and bye for now.