Sampling Methods

Front

One of the best ways to avoid bias and errors when selecting a sample.

Back

Make sure the sample is randomly selected.

Front

Simple Random Sample

Back

A sampling method where each member of the population has an equal chance of being selected.

Front

Example of Simple Random Sampling

Back

Drawing names from a hat.

Front

Systematic sampling is useful if ...

Back

Not all the members of the population are available at the same time.

Front

Systematic sampling

Back

A sample is created by selecting members of the population at regular intervals.

Front

Stratified sampling is useful when ...

Back

the population is divided into subgroups.

Front

Stratified sampling

Back

Proportions or ratios are used to determine the number to be sampled from each sub group

Front

Purpose of using proportions or ratios in stratified sampling.

Back

To make sure each subgroup is represented fairly.

Front

Self Selecting Samples

Back

People volunteer to be part of the sample.

Front

Examples of when we use Self Selecting Samples

Back

Drug trial and special diet and exercise regime.