QM2 Week9 Tutorial Game April25

In a between-subject design, how are participants assigned?

• Participants are randomly assigned to one condition

• Different groups are assigned to different conditions

• Participants choose their condition

• Each participant experiences all conditions

What does a null hypothesis (H₀) represent?

• A variable that is manipulated

• A prediction of the outcome

• A statement of a significant effect

• A statement of no effect

What is a confounding variable?

• A variable that is measured

• A variable that is kept constant

• A variable that affects both IV and DV

• A variable that is manipulated

Which research approach manipulates an independent variable?

• Survey Research

• Observational Studies

• Experimental Research

• Correlational Research

What is the main difference between independent and dependent variables?

• IV is control, DV is measured

• IV is manipulated, DV is measured

• IV is measured, DV is manipulated

• IV is measured, DV is control

In a recent study, Priya is testing a new teaching method to see if it improves student performance. What is the primary goal of hypothesis testing in her research?

• To prove a hypothesis

• To gather evidence for or against a hypothesis

• To measure outcomes

• To manipulate variables

What is the null hypothesis in a one-sample t-test?

• The sample mean equals zero

• The sample mean equals the known population mean

• The sample mean is higher than the population mean

• The sample and population are independent

A one-sample t-test is most appropriate when:

• You have one group and no reference value

• You are comparing two unrelated groups

• You are comparing a group mean to a known constant

• You are testing two conditions in the same group

Which of the following would violate the assumptions of a one-sample t-test?

• Using interval data

• Data that is normally distributed

• Using nominal data as DV

• Having independent observations

If your sample size is 20, what are the degrees of freedom in a one-sample t-test?

• 20

• 19

• 18

• 21