Suppose an instructor gave a 15 item quiz and weighted each

Last updated: 2/5/2023

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