It is a toolbox for Sequential Probability Ratio Tests (SPRT),  Wald (1945) <doi:10.2134/agronj1947.00021962003900070011x>.
    SPRTs are applied to the data during the sampling process, ideally after each observation.
    At any stage, the test will return a decision to either continue sampling or terminate and accept one of the specified hypotheses.
    The seq_ttest() function performs one-sample, two-sample, and paired t-tests for testing one- and two-sided hypotheses (Schnuerch & Erdfelder (2019) <doi:10.1037/met0000234>).
    The seq_anova() function allows to perform a sequential one-way fixed effects ANOVA (Steinhilber et al. (2023) <doi:10.31234/osf.io/m64ne>).
    Learn more about the package by using vignettes "browseVignettes(package = "sprtt")" or go to the website <https://meikesteinhilber.github.io/sprtt/>.

Sequential Poisson sampling is a variation of Poisson sampling for
    drawing probability-proportional-to-size samples with a given number of
    units, and is commonly used for price-index surveys. This package gives
    functions to draw stratified sequential Poisson samples according to the
    method by Ohlsson (1998, ISSN:0282-423X), as well as other order sample
    designs by Rosén (1997, <doi:10.1016/S0378-3758(96)00186-3>), and generate
    appropriate bootstrap replicate weights according to the generalized
    bootstrap method by Beaumont and Patak
    (2012, <doi:10.1111/j.1751-5823.2011.00166.x>).

The systemPipeShiny (SPS) framework comes with many UI and server components. However, installing the whole framework is heavy and takes some time. If you would like to use UI and server components from SPS in your own Shiny apps, do not hesitate to try this package.

Fits spatial scale (SS) forward stepwise regression, SS incremental forward stagewise regression, SS least angle regression (LARS), and SS lasso models.  All area-level covariates are considered at all available scales to enter a model, but the SS algorithms are constrained to select each area-level covariate at a single spatial scale.