## What is the use of resampling?

Resampling is a methodology of economically using a data sample to improve the accuracy and quantify the uncertainty of a population parameter. Resampling methods, in fact, make use of a nested resampling method.

**What is a permutation test used for?**

A permutation test5 is used to determine the statistical significance of a model by computing a test statistic on the dataset and then for many random permutations of that data. If the model is significant, the original test statistic value should lie at one of the tails of the null hypothesis distribution.

### What do you need to know about statistical resampling?

Statistical resampling methods are procedures that describe how to economically use available data to estimate a population parameter. The result can be both a more accurate estimate of the parameter (such as taking the mean of the estimates) and a quantification of the uncertainty of the estimate (such as adding a confidence interval).

**Which is the best method for resampling A sample?**

This has implications for statistical tests performed on the sample of estimated population parameters downstream, i.e. paired statistical tests may be required. Two commonly used resampling methods that you may encounter are k-fold cross-validation and the bootstrap.

#### How is resampling used to estimate a population parameter?

One way to address this is by estimating the population parameter multiple times from our data sample. This is called resampling. Statistical resampling methods are procedures that describe how to economically use available data to estimate a population parameter.

**What’s the difference between data sampling and data resampling?**

Data sampling refers to statistical methods for selecting observations from the domain with the objective of estimating a population parameter. Whereas data resampling refers to methods for economically using a collected dataset to improve the estimate of the population parameter and help to quantify the uncertainty of the estimate.