How do these two groups compare in terms of variability in MATH scores? Explain. Solution the second group has more variation, but only SLIGHTLY.. the first group has a standard deviation of 14.538, where as the second group has a standard deviation of 14.782, therefore making it have more variability. the standard deviation is the best to use because it is not affected by outliers. the second group has also a more skewed distribution than the first group..