PHP | stats_stat_independent_t() Function

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 )


Parameter Details

Sr.NoParameterDescription
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)


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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