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Description

More Statistical Methods for Composite Material Data.

A companion package to 'cmstatr' <https://cran.r-project.org/package=cmstatr>. 'cmstatr' contains statistical methods that are published in the Composite Materials Handbook, Volume 1 (2012, ISBN: 978-0-7680-7811-4), while 'cmstatrExt' contains statistical methods that are not included in that handbook.

cmstatrExt

R-CMD-check

cmstatrExt provides statistical methods intended for composite material data that are not included in CMH-17-1G.

Installation

You can install this package from CRAN as follows:

install.packages("cmstatrExt")

Example Usage

In these examples we’ll use the following packages:

library(cmstatrExt)
library(tidyverse)

Currently, this package provides several functions related to equivalency tests. Factors for a two-sample dual-acceptance criteria can be calculated as follows:

k <- k_equiv_two_sample(
  alpha = 0.05,
  n = 18,  # size of the qualification sample
  m = 6    # size of the acceptance sample
)
k
#> [1] 2.9594727 0.9541395

The power of this test for detecting reduction in mean can be computed as follows:

power_sim_dual(
  n_qual = 18,
  m_equiv = 6,
  replicates = 2500,
  distribution = "rnorm",
  param_qual = data.frame(mean = 0, sd = 1),
  param_equiv = data.frame(mean = seq(-2, 0, length.out = 11), sd = 1),
  k1 = k[1], k2 = k[2]
) %>% 
  mutate(delta = 0 - mean) %>% 
  ggplot(aes(x = delta, y = `Rejection Rate`)) +
  geom_line()

Development

If you have a suggestion or question, please create an issue on GitHub.

If you want to contribute to this package, Pull Requests are welcome!

Metadata

Version

0.4.0

License

Unknown

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