3. A population has a mean of u = 20. a. If 5 points were added to every score, what would be the value for the new mean? b. If every score were multiplied by 3, what would be the value for the new mean? 4. For the following population of N=6 scores: 2, 4, 8. 6. 10, 12. a. Calculate the range and the standard deviation. (Use either definition for the range. D. Add 2 points to each score and compute the range and standard deviation again. Describe how adding a constant to each score influences measures of