PHP | stats_stat_independent_t() 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_stat_independent_t() function.

The built-in PHP stats_stat_independent_t() function is used to return the t-value from the independent two-sample t-test.

Syntax

Following below is the syntax to use this function -

float stats_stat_independent_t( array $arr1, array $arr2 )

READ: PHP | stats_stat_correlation() Function

Parameter Details

Sr.No	Parameter	Description
1	arr1	The first set of values
2	arr2	The second set of values

Return Value

This built-in function returns the t-value of the independent two-sample t-test between arr1 and arr2, 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).

Example1

In the below example, we have compute the t-value of the independent two-sample t-test between two arrays -

<?php
   var_dump(round(stats_stat_independent_t(array(1, 2), array(1, 2)), 8));
?>

Output

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

float(0)

Example2

In the below example, we have compute the t-value of the independent two-sample t-test between two arrays -

<?php
   var_dump(round(stats_stat_independent_t(array(1, 2), array(2, 3)), 8));
?>

Output

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

float(-1.41421356)

Example3

The following is an error case. In the below example, we have passed the length of arr1 < 2. A warning is shown in logs -

<?php
   // error cases
   var_dump(stats_stat_independent_t(array(1), array(1, 2)));
?>

Output

The above code will produce the following result and a warning in logs PHP Warning: stats_stat_independent_t(): Each argument should have more than one element.

float(2)

Example4

The following is an error case. In the below example, we have passed the length of arr2 < 2. A warning is shown in logs -

<?php
   // error cases
   var_dump(stats_stat_independent_t(array(1, 2), array(1)));
?>

Output

The above code will produce the following result and a warning in logs PHP Warning: stats_stat_independent_t(): Each argument should have more than one element.

bool(false)

READ: PHP | stats_stat_factorial() Function

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 stats_stat_innerproduct() Function.

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