Cluster sampling

A method of sampling a population where you

Divide into sub categories

One or more categories chosen. Everyone is sampled in the chosen categories (also known as one-stage cluster sampling).

 To summarise, think: Everyone in a couple of categories.

To remember this think of the following:

1.  Divide into clusters

The hamster tried to eat all the nut clusters but only managed two of them before she was stuffed. She couldn’t get any more in.

Example

These are the results of a survey to see what percentage of people would attend a cinema screening of a live gig by a band.

There are 16000 people in the town. How many 15 to 18-year-olds would have to be surveyed if you used cluster sampling?

Answer:

15% of 16000 would have to be questioned for cluster sampling.

Therefore   `15times16000/100=2400`