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_paired_t() function.
The stats_stat_paired_t() function is used to return the t-value of the dependent t-test for paired samples.
The stats_stat_paired_t() function is used to return the t-value of the dependent t-test for paired samples.
Syntax
Following below is the syntax to use this function -
float stats_stat_paired_t( array $arr1, array $arr2 )
Parameter Details
Sr.No | Parameter | Description |
---|---|---|
1 | arr1 | The first samples |
2 | arr2 | The second samples |
Return Value
This built-in function returns the t-value of the dependent t-test for the paired samples 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 following example, we have compute the t-value of the dependent t-test for paired samples arr1 and arr2 -
<?php var_dump(stats_stat_paired_t(array(1, 2), array(1, 1))); ?>
Output
When the above code is executed, it will produce the following result -
float(1)
Example2
In the following example, we have compute the t-value of the dependent t-test for paired samples arr1 and arr2 -
<?php var_dump(stats_stat_paired_t(array(1, 2), array(2, 1))); ?>
Output
When the above code is executed, it will produce the following result -
float(0)
Example3
In the following example, we have compute the t-value of the dependent t-test for paired samples arr1 and arr2 -
<?php var_dump(stats_stat_paired_t(array(1, 2), array(2, 2))); ?>
Output
When the above code is executed, it will produce the following result -
float(-1)
Example4
The following is an error case. In the below example, we passed unequal array lengths. A warning is shown in logs -
<?php // error cases var_dump(stats_stat_paired_t(array(1, 2), array(1, 2, 3))); ?>
Output
The above code will produce the following result and a warning in logs PHP Warning: stats_stat_paired_t(): Unequal number of X and Y coordinates.
bool(false)
Example5
The following is an error case. In the below example, we have passed arrays with single elements. A warning is shown in logs -
<?php // error cases var_dump(stats_stat_paired_t(array(1), array(2))); ?>
Output
The above code will produce the following result and a warning in logs PHP Warning: stats_stat_paired_t(): arr1 should have at least 2 elements
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_percentile() Function.
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Thanks for reading and bye for now.