PHP Class MathPHP\Probability\Distribution\Table\TDistribution

Tables for one sided and two sided, Initial index is degrees of freedom (ν). Second index is confidence level precentage, or alpha value (α). https://en.wikipedia.org/wiki/Student%27s_t-distribution#Table_of_selected_values This table is provided only for completeness. It is common for statistics textbooks to include this table, so this library does as well. It is better to use the StudentT distribution functions when a t value is required.
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Public Methods

Method Description
getOneSidedTValueFromAlpha ( string $ν, string $α ) : float Get one-sided t value using alpha
getOneSidedTValueFromConfidenceLevel ( string $ν, string $cl ) : float Get one-sided t value using confidence level percentage
getTwoSidedTValueFromAlpha ( string $ν, string $α ) : float Get two-sided t value using alpha
getTwoSidedTValueFromConfidenceLevel ( string $ν, string $cl ) : float Get two-sided t value using confidence level percentage

Method Details

getOneSidedTValueFromAlpha() public static method

Get one-sided t value using alpha
public static getOneSidedTValueFromAlpha ( string $ν, string $α ) : float
$ν string degrees of freedom
$α string alpha
return float t value

getOneSidedTValueFromConfidenceLevel() public static method

Get one-sided t value using confidence level percentage
public static getOneSidedTValueFromConfidenceLevel ( string $ν, string $cl ) : float
$ν string degrees of freedom
$cl string confidence level percentage
return float t value

getTwoSidedTValueFromAlpha() public static method

Get two-sided t value using alpha
public static getTwoSidedTValueFromAlpha ( string $ν, string $α ) : float
$ν string degrees of freedom
$α string alpha
return float t value

getTwoSidedTValueFromConfidenceLevel() public static method

Get two-sided t value using confidence level percentage
public static getTwoSidedTValueFromConfidenceLevel ( string $ν, string $cl ) : float
$ν string degrees of freedom
$cl string confidence level percentage
return float t value