Suppose an instructor gave a 15-item quiz and weighted each item 1 point. The mean scor on the test was 10 points and the standard deviation was 3 points. On this quiz the scores" correlation with scores on a preceding quiz was .56. Suppose the instructor later decided that each item should have received a weight of 5 points and so multiplied every examinee score by 5. How many times larger is the standard deviation of the new scores?