Choosing Unbiased Samples Quiz

What is an unbiased sample?

• A sample that includes only the people you know.

• A sample that represents the entire population fairly.

• A sample that is chosen based on convenience.

• A sample that is the largest possible.

Why is random selection important in creating an unbiased sample?

• It ensures that everyone has an equal chance of being chosen.

• It makes the process faster.

• It guarantees that only the best people are chosen.

• It allows you to choose your friends.

Which method can be used to select a random sample?

• Picking names from a hat.

• Choosing the first ten people you see.

• Asking for volunteers.

• Selecting people based on their height.

Identify the bias in the following sample: A teacher asks only the students sitting in the front row about their favorite subject.

• The sample is too large.

• The sample is not random.

• The sample includes too many subjects.

• The sample is too diverse.

Which of the following is an example of a biased sample?

• Surveying every tenth person on a list.

• Asking only your friends about their favorite food.

• Using a computer to randomly select participants.

• Drawing names from a hat.

How can you evaluate if a sample is representative of a population?

• By checking if it includes people from different groups within the population.

• By ensuring it is the largest possible sample.

• By asking the same question multiple times.

• By selecting only the people you know.

Explain why a sample of only morning commuters might be biased when studying the daily habits of all city residents.

• It includes people from all parts of the city.

• It only includes people who travel in the morning.

• It is too small to be useful.

• It is chosen randomly.

What is one strategy to avoid bias when selecting a sample?

• Choose people who are easy to reach.

• Use a random number generator to select participants.

• Select people based on their opinions.

• Pick people who are similar to each other.

Why might a sample of only high school students be biased when studying the eating habits of all teenagers?

• It includes teenagers from different schools.

• It excludes teenagers who are not in high school.

• It is too large to manage.

• It is randomly selected.

What is the main goal of selecting an unbiased sample?

• To make the process easier.

• To ensure the results are fair and accurate.

• To include as many people as possible.

• To save time and resources.