Package 'sstn'

Self-Similarity Test for Normality (SSTN)

Description

The SSTN is a statistical test for assessing whether a given sample originates from a normal distribution. It is based on the iterative application of the empirical characteristic function and comparing these estimated characteristic functions. A Monte Carlo procedure is used to obtain the empirical distribution of the test statistic under the null hypothesis.

Usage

sstn(x, verbose = FALSE)

Arguments

x	Numeric vector of observations $(x_1, \dots, x_n)$ drawn from a distribution with finite variance. Must have length $n \ge 2$.
verbose	Logical. If TRUE (default), prints a summary of the test results including the number of summands, test statistic, and $p$-value.

Value

An invisible list with the following components:

test.statistic	Numeric. The observed value of the SSTN test statistic.
method	Character string indicating whether the asymptotic or the finite-sample null distribution was used.
p.value	Numeric. The $p$-value of the test.

Author(s)

Akin Anarat [email protected]

References

Anarat, A. and Schwender, H. (2026). A test for normality based on self-similarity. arXiv preprint https://doi.org/10.48550/arXiv.2604.03810.

Examples

set.seed(123)
# Sample from standard normal (null hypothesis true)
x <- rnorm(100)
res <- sstn(x)
res$p.value

# Sample from Gamma distribution (null hypothesis false)
y <- rgamma(100, 1)
res2 <- sstn(y)
res2$p.value

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