Experimental Design Practice

What is a variable in the context of experimental design?

• A variable is a fixed factor that does not change during an experiment.

• A variable is any factor, trait, or condition that can exist in differing amounts or types in an experiment.

• A variable is a type of measurement used to quantify results.

• A variable is a constant that remains the same throughout the experiment.

How do you identify the independent variable in an experiment?

• The independent variable is the one that is deliberately changed or manipulated by the experimenter.

• The independent variable is the one that remains constant throughout the experiment.

• The independent variable is the one that is measured as a result of the experiment.

• The independent variable is the one that is influenced by the dependent variable.

What is a scientific experiment?

• A method to collect data without any manipulation of variables.

• A structured procedure to investigate a hypothesis by manipulating variables and observing outcomes.

• An informal way to test ideas without a systematic approach.

• A process of making observations without any specific goal.

What is the role of a hypothesis in experimental design?

• A hypothesis is a testable prediction about the relationship between the independent and dependent variables.

• A hypothesis is a definitive conclusion drawn from experimental data.

• A hypothesis is an untestable statement about the outcome of an experiment.

• A hypothesis is a random guess made before conducting an experiment.

What is the purpose of conducting multiple trials in an experiment?

• To ensure the reliability and accuracy of the results by minimizing the effects of random variation.

• To make the experiment more complex and difficult to analyze.

• To increase the time taken for the experiment to be completed.

• To ensure that the results are always the same regardless of variations.

What is the importance of randomization in experimental design?

• Randomization helps to eliminate bias and ensures that the sample is representative of the population.

• Randomization is used to increase the sample size of the experiment.

• Randomization allows researchers to control for all variables in the study.

• Randomization is primarily used to select participants for qualitative research.

What does it mean to replicate an experiment?

• To repeat an experiment under the same conditions to verify the results.

• To conduct an experiment in a different environment to see if results vary.

• To analyze the data from an experiment without performing it again.

• To modify the experiment's variables to test different outcomes.

What is the role of data analysis in experimental design?

• Data analysis is used to collect data only.

• Data analysis involves interpreting the collected data to draw conclusions and make informed decisions based on the results.

• Data analysis is not necessary in experimental design.

• Data analysis only focuses on data visualization.

What is a control group?

• A group that receives the treatment in an experiment.

• A standard of comparison in an experiment that is not exposed to the treatment or independent variable.

• A group that is randomly selected for the experiment.

• A group that is used to manipulate the independent variable.

What is a dependent variable?

• The factor that is manipulated in an experiment.

• The factor that is measured or observed in an experiment, which is affected by changes in the independent variable.

• A variable that remains constant throughout the experiment.

• The variable that is not affected by any changes in the experiment.