`cmstatrExt`

`cmstatrExt`

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

You can install this package from CRAN as follows:

```
install.packages("cmstatrExt")
```

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()
```

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!

**Any scripts or data that you put into this service are public.**

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