Multiple Choice
Which of the following would not be considered a preanalytical error in a laboratory setting?
4. BONUS: Lab Techniques and Procedures
Experimental Error
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Why is it important to include a negative control in an experiment?
A
To identify any effects not related to the experimental variable.
B
To increase the sample size for more accurate results.
C
To confirm the presence of the experimental variable.
D
To ensure that the experiment is conducted under optimal conditions.
Verified step by step guidance1
Understand the purpose of a negative control: A negative control is a part of an experiment that does not receive the experimental treatment or variable. It is used to ensure that any observed effects are due to the experimental variable and not other factors.
Identify the role of a negative control in distinguishing effects: By including a negative control, researchers can identify any changes or effects that occur in the absence of the experimental variable, helping to confirm that observed effects in the experimental group are indeed due to the variable being tested.
Consider the importance of eliminating confounding factors: A negative control helps to rule out confounding factors or external influences that might affect the results, ensuring that the experiment's findings are valid and reliable.
Evaluate the experimental design: Including a negative control is a critical aspect of experimental design, as it helps to validate the results and provides a baseline for comparison with the experimental group.
Reflect on the scientific method: The use of negative controls is a fundamental part of the scientific method, allowing researchers to draw accurate conclusions by comparing the experimental group to a group where the variable is absent.
Related Videos
Related Practice
Experimental Error practice set
Problem sets built by lead tutorsExpert video explanations