Gianna wants to find out if the intelligence scores of a group of students on a gluten-free diet is different from the average intelligence of students on a non-gluten-free diet. What test is most suited to Gianna's research?
A) A correlation
B) A z-test
C) An independent samples t-test
D) A dependent samples t-test

Question

Quizplus · Accepted Answer

An independent samples t-test is the most suitable test for this research question as it compares the mean of two independent groups (gluten-free diet students and non-gluten-free diet students) and tests if they are significantly different. A z-test is used when population parameters are known, and a correlation is used to measure the relationship between two variables. A dependent samples t-test is used when two groups are paired or when the same group is measured twice.

Gianna Wants to Find Out If the Intelligence Scores of a Group