Karl conducted an experimental study to see the relationship between room lighting and test performance. He randomly assigned participants to one of three conditions: room with dim lighting, room with normal lighting, and room with bright lighting. He then gave the participants a cognitive ability test. What statistical test should he use to compare the mean test performance of the three groups?

Question

Quizplus · Accepted Answer

ANOVA (Analysis of Variance) is the appropriate statistical test to compare the means of three or more groups. It allows for testing whether there is a significant difference between the means of the three groups, and if so, which groups differ significantly from each other. The t-test is used to compare the means of two groups, and correlation is used to test the relationship between two variables. Meta-analysis is a statistical method for combining the results of multiple studies on the same topic.

Karl Conducted an Experimental Study to See the Relationship Between