Population Sampling and Biased

What is the purpose of repeating the quadrat sampling process several times?

• To ensure accuracy

• To cover more area

• To count more organisms

• To avoid biased results

What is the first step in the capture-recapture method?

• Release the marked individuals

• Recapture a sample of individuals

• Capture and mark a small sample of organisms

• Allow time for individuals to mix back into the population

What is the main advantage of using random sampling in ecological studies?

• It ensures a larger sample size

• It reduces sampling bias

• It is easier to perform

• It provides more detailed data

Which of the following is NOT a type of sampling technique shown in the image?

• Transects

• Capture-recapture

• Quadrats

• Random Sampling

Why do we randomly select our samples?

• for control

• reduce bias

• so we don't get the same answers from everyone

• to eliminate confounding results

A ___ is a large group that includes everything being studied.

• Sample

• Stratified Sampling Method

• Population

• Voluntary-Response

It is important that the chosen group is representative of the population, and not systematically biased.

• FACT

• BLUFF

Source of bias that occurs when an individual chosen for the sample CAN'T be contacted or refuses to cooperate.

• Response Bias

• Undercoverage

• Nonresponse

• Voluntary Response

Biased or Unbiased?
Carlos wants to know the favorite sport of people at his school so he asks his baseball team.

• Biased

• Unbiased

What is the main reason for using stratified sampling in population studies?

• To ensure each subgroup is represented

• To increase sample size

• To simplify data collection

• To reduce costs