Carrying out Ecological Surveys

The main goal of random sampling is to achieve a ______ sample.

• biased

• representative

• small

• expensive

Random sampling is ________ to design.

• Easy

• Difficult

• Impossible

• Time-consuming

Is random sampling suitable for fast-moving animals?

• It is suitable

• It is not suitable

Systematic sampling is often used when a complete list of the population is available. True or False?

• True

• False

In stratified sampling, samples are taken from each ______.

• individual

• stratum

• random group

• overlapping group

In the context of stratified sampling, what does 'stratum' refer to?

• A random selection

• A group or subset of the population

• An individual

• A single data point.

Which of the following is NOT a characteristic of stratified sampling?

• A) Non-overlapping groups

• B) Random selection within strata

• C) Overlapping groups

• D) Defined strata.

What does heterogeneous mean? (two correct answers)

• the same

• different

• many different kinds

• lots of similar types

Stratified sampling is particularly useful when the population is ________.

• A) homogeneous

• B) heterogeneous

• C) small

• D) large

One disadvantage of stratified sampling is that it can be ________.

• more complex to organize

• less accurate

• less representative

• more biased