Data Collection - Sampling Techniques

A survey that includes all members of the population is called a .....

When a subset (smaller group) from the population is surveyed, it is called a ....

What are some of the advantages of doing a census?

(More than one answer.)

• Quicker

• Cheaper

• All members are included in the survey.

• Results are representative of entire population.

What are some of the advantages of doing a sample?

(More than one answer.)

• Quicker

• Cheaper

• All members are included in the survey.

• Results are representative of entire population.

To give accurate results that reflect the population, the sample should be ........

• biased

• representative

• small

• convenient

When the sample chosen favours a particular outcome (leans in a certain direction), it is ....

To avoid bias in the results of a survey, participants should be selected .....

In a simple random sample, every member of the population has an ..... chance of being selected.

One example of a simple random sample of school students would be choosing students ...

• from one class.

• at the canteen.

• on the soccer oval.

• from all names in a hat.

Advantages of random sampling include ...

(more than one answer.)

• reduces bias

• quick and easy

• results are more likely to be representative

• requires knowledge of population structure