Dr.Moo would like to find out if participants who ate glazed donuts became happier after they ate jelly-filled donuts.What test should you use to determine this?
A)factorial ANOVA
B)independent-samples t-test
C)dependent-samples t-test
D)repeated-measures ANOVA

Question

Quizplus · Accepted Answer

A dependent-samples t-test would be the best choice for determining if participants became happier after eating donuts because it measures the difference between two related groups (in this case, the same participants before and after eating different types of donuts) and assesses whether that difference is statistically significant. It is an appropriate choice because Dr.Moo is interested in comparing the same individuals before and after consuming different types of donuts, so we need to use a test that acknowledges the dependent nature of the data.  A factorial ANOVA would be used when testing the effects of two or more independent variables on a dependent variable, but in this case, there is only one independent variable (type of donut) being tested. An independent-samples t-test would be used to compare two different groups on a single variable, which is not the case here because we are comparing the same group of participants before and after eating different types of donuts. A repeated-measures ANOVA would also be inappropriate because it is used to test the effects of at least one independent variable on a dependent variable that has been measured multiple times on the same individuals.

DrMoo Would Like to Find Out If Participants Who Ate