2.67 Standardized Test Scores A district's school board's verbal and mathematics scholastic aptitude tests are scored on a scale of 200 to 800. Although the tests were originally designed to produce mean scores of approximately 500, the mean verbal and math scores in recent years have been as low as 463 and 493, respectively, and have been trending downward. It seems reasonable to assume that a distribution of all test scores, either verbal or math, is mound-shaped. If or is the standard deviation of one of these distributions, what is the largest value (approximately) that or might assume? Explain.