A biopsychologist is interested in studying the effects of marijuana on cognitive skills by studying a group of 7 rats.He puts each rat in a maze and measures the time it takes the rat (in minutes) to find the cheese at the end of the maze.He then puts a mask on the rat and has it inhale marijuana smoke for 5 seconds.He then puts the rat back in the maze,and records its time to reach the cheese.Twenty minutes later he puts the rat back in the maze to test for lasting effects of the drug.The tables below summarize the data and part of the data analysis:

What is the MS_IV?

Question

A biopsychologist is interested in studying the effects of marijuana on cognitive skills by studying a group of 7 rats.He puts each rat in a maze and measures the time it takes the rat (in minutes) to find the cheese at the end of the maze.He then puts a mask on the rat and has it inhale marijuana smoke for 5 seconds.He then puts the rat back in the maze,and records its time to reach the cheese.Twenty minutes later he puts the rat back in the maze to test for lasting effects of the drug.The tables below summarize the data and part of the data analysis:

What is the MS_IV?

Quizplus · Accepted Answer

The MS_IV represents the mean square for the within-subjects factor in the analysis of variance (ANOVA). By looking at the table, we can see that the mean square for the within-subjects factor is 16.62. This means that the variability in the data due to individual differences between rats is relatively small compared to the variability due to the effects of the marijuana treatment. Therefore, we can conclude that the marijuana has a significant effect on the rats' performance in the maze.

A Biopsychologist Is Interested in Studying the Effects of Marijuana