> ## Documentation Index
> Fetch the complete documentation index at: https://v1-learn.neoartd.my.id/llms.txt
> Use this file to discover all available pages before exploring further.

# Pengumpulan Data dan Teknik Pengambilan Sampel

To obtain samples that are unbiased, statisticians use four methods of sampling.

## Four methods of sampling

### Random samples

`Random samples` are selected by using chance methods or random numbers.

### Systematic samples

`Systematic samples` are obtained by numbering each value in the population and then selecting every $k^{th}$ value.

### Stratified samples

`Stratified samples` are selected by dividing the population into groups (strata) according to some characteristic and then taking samples from each group.

### Cluster samples

`Cluster samples` are selected by dividing the population into groups and then taking samples of the groups.