Check out the bar graph above illustrating a difference in brain volume index between zombies (Mean = 1.374, S.D. = 0.12) and controls (Mean = 1.115, S.D. = 0.09). How would this data be analyzed? Independent samples t-test. Now, in reference to the previous question, which one of the following is a reflection of individual differences among participants? The p-value The standard deviation scores The n-size The group Means (averages)