What is the term for a group selected from a population to participate in a study?

• Sample

• Variable

• Hypothesis

• Bias

Which of the following best describes a population in scientific research?

• The group of people who analyse the data

• The entire group about which information is wanted

• The group of researchers conducting the study

• The equipment used in the experiment

What is an independent variable?

• The variable that is measured in an experiment

• The variable that is kept constant

• The variable that is changed or manipulated by the researcher

• The variable that is not recorded

Which variable is measured to see if it is affected by changes in the independent variable?

• Extraneous variable

• Dependent variable

• Control variable

• Sample variable

What is an extraneous variable?

• A variable that is intentionally changed

• A variable that is measured as the outcome

• A variable that could influence the results but is not the focus of the study

• A variable that is always constant

What is a hypothesis?

• A proven fact

• A testable prediction or statement about the relationship between variables

• A type of bias

• A method of data collection

Which of the following best describes accuracy in scientific measurement?

• Getting the same result every time

• Measuring the correct or true value

• Using a large sample size

• Repeating the experiment

A thermometer that gives the correct temperature is an example of:

• Precision

• Accuracy

• Reliability

• Validity

What does internal validity refer to?

• The ability to generalise results to other settings

• The accuracy of the results within the study itself

• The number of participants in the study

• The type of data collected

What is external validity?

• The ability to repeat the experiment

• The ability to generalise the results to other people, places, or times

• The accuracy of the measuring instrument

• The number of variables in the study