IB Biology Skills: Reliability 1

The video tutorial covers IB biology skills focusing on reliability, precision, and accuracy in experiments. It uses archery analogies to explain these concepts, emphasizing the importance of repeatability and reproducibility. The tutorial also distinguishes between precision and accuracy, illustrating how results can be precise but not accurate. The video concludes by summarizing the key aspects of reliability in scientific experiments.

What is the main difference between reliability and precision in scientific experiments?

• Reliability refers to consistency, while precision refers to closeness of results.

• Reliability is about accuracy, while precision is about consistency.

• Reliability and precision are the same in scientific terms.

• Reliability is about repeatability, while precision is about accuracy.

In the archery analogy, why is Robin Hood considered more reliable than Fluky Luke?

• Fluky Luke never hits the target.

• Fluky Luke uses different arrows each time.

• Robin Hood consistently hits the bullseye.

• Robin Hood uses a magical bow.

What does repeatability in an experiment indicate?

• Different results each time the experiment is repeated.

• Similar results when the experiment is repeated by the same investigator.

• The experiment can only be performed once.

• The experiment is accurate but not precise.

How did Fluky Luke achieve consistent results with the magical bow?

• By using different arrows.

• By changing his shooting technique.

• By using a bow that never misses.

• By practicing archery regularly.

What is the key difference between precision and accuracy?

• Precision is about closeness to the true value, accuracy is about consistency.

• Precision is about consistency, accuracy is about closeness to the true value.

• Precision and accuracy are the same.

• Precision is about repeatability, accuracy is about reproducibility.

Why are the results of the mung bean experiment considered precise but not accurate?

• The results are neither close to each other nor to the true value.

• The results vary widely.

• The results are close to the true value but not to each other.

• The results are close to each other but not to the true value.

What does reproducibility in an experiment mean?

• The experiment can be repeated by the same investigator with different results.

• The experiment is accurate but not precise.

• The experiment can be repeated by a new investigator with similar results.

• The experiment cannot be repeated.

How was the magical bow proven to be reproducible?

• It was tested with different types of arrows.

• It was used in different weather conditions.

• Different archers achieved the same results with it.

• Only Fluky Luke could use it effectively.

Which of the following is NOT a characteristic of a reliable experiment?

• High degree of repeatability

• High degree of reproducibility

• High degree of variability

• Consistent results

What should be considered when evaluating the quality of primary data?

• Both accuracy and precision

• Neither accuracy nor precision

• Only precision

• Only accuracy