theplu::yat::statistics::Anova Class Reference

one-way ANOVA More...

#include <yat/statistics/Anova.h>

Public Member Functions
	Anova (size_t n)
void	add (double x, size_t g, long int n=1)
	add a data point More...
double	F (void) const
size_t	inter_df (void) const
size_t	intra_df (void) const
double	p_value (void) const
void	reset (void)
	remove all data

Detailed Description

one-way ANOVA

One-way Analysis of Variance is an extension of a t-test to compare also more than two groups.

Since

New in yat 0.20

Constructor & Destructor Documentation

Anova()

theplu::yat::statistics::Anova::Anova

(

size_t

n

)

Parameters

n	number of groups compared

Member Function Documentation

add()

void theplu::yat::statistics::Anova::add	(	double	x,
		size_t	g,
		long int	n = 1
	)

add a data point

Parameters

x	value of data point
g	group the data belongs to
n	number of data points

F()

double theplu::yat::statistics::Anova::F

(

void

)

const

F is calculated as the ratio between within-group variance and between-group variance.

If null hypothesis is true, F follows an F(a,b) distribution where a is inter_df() and b is intra_df.

inter_df()

size_t theplu::yat::statistics::Anova::inter_df

(

void

)

const

Number of samples minus one.

intra_df()

size_t theplu::yat::statistics::Anova::intra_df

(

void

)

const

Number of groups minus one

p_value()

double theplu::yat::statistics::Anova::p_value

(

void

)

const

Calculates the probability to get F (or larger) given the null hypothesis that there is no difference between the groups.

Returns

the one-sided p-value

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The documentation for this class was generated from the following file:

• yat/statistics/Anova.h