IB Chemistry: Reliability Part 1

The video tutorial covers key IB chemistry 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 video distinguishes between precision and accuracy, illustrating how results can be precise but not accurate. It concludes by summarizing the importance of these concepts in evaluating experimental data.

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

• Reliability is about the true value, while precision is about the method used.

• Reliability and precision are the same in scientific terms.

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

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

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

• Robin Hood consistently hits the bullseye.

• Fluky Luke uses different arrows each time.

• Robin Hood uses a magical bow.

• Fluky Luke never hits the target.

What does repeatability in an experiment indicate?

• The experiment can be repeated by anyone.

• The results are always accurate.

• The original investigator gets similar results using the same method.

• The experiment uses different methods each time.

How does Fluky Luke confirm the reliability of his magical bow?

• By changing targets.

• By consistently hitting the bullseye multiple times.

• By using different arrows.

• By hitting the bullseye once.

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 the method used, accuracy is about the results.

Why is Too Tall Trevor considered precise but not accurate?

• His arrows hit the bullseye every time.

• He uses a magical bow.

• His arrows are close to each other but not to the bullseye.

• His arrows are spread out but near the bullseye.

What does reproducibility in an experiment mean?

• The experiment uses different equipment each time.

• The results are always precise.

• A new investigator gets similar results using the same method.

• The experiment can be repeated by the original investigator.

How is reproducibility demonstrated with Fluky Luke's magical bow?

• The bow fails to hit the target.

• Only Fluky Luke can hit the bullseye.

• Different archers achieve the same results with the bow.

• The bow only works for Robin Hood.

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

• Only accuracy.

• Only precision.

• Both accuracy and precision.

• Neither accuracy nor precision.

Which of the following is true about a reliable experiment?

• It is always accurate.

• It has high repeatability and reproducibility.

• It uses different methods each time.

• It is only precise.