T08 t-test concept

What types of t-test have you learnt so far?

• Three-sample t-test

• Independent samples t-test

• Paired t-test

• Sample mean t-test

• One sample t-test

In paired t-test, there is always __________________ between the two observations drawn from the same pool of participants.

What should we fill in the blank?

• one-to-one pairing

• no pairing

• special relationship

• a middleman

"We use paired t-test if the experiment is in ______________."

What should we fill in the blank?

• within-subject design

• mixed design

• between-subject design

What do we need to compute before doing the hypothesis testing in paired t-test?

• SUM scores from two observations, its mean and SD

• DIFFERENCE scores from two observations, its mean and SD

• PRODUCT scores from two observations, its mean and SD

• QUOTIENT scores from two observations, its mean and SD

"We use independent sample t-test if the experiment is in ___________________."

What should we fill in the blank?

• within-subject design

• between-subject design

• mixed design

For independent sample t-test, is the sample for observation 1 related to the sample for observation 2?

• Yes, they are related.

• No, they are not related.

What's the special assumption for using independent sample t-test?

• Equal-mean assumption

• Equal-median assumption

• Equal-variance assumption

• Equal-standard deviation assumption

To check whether there is equal-variance or not, what should we do?

• Do a Levene's test

• Do a Normality test

• Compute the effect size

• Set lower alpha level