7. For the following sample of data: 11 19 8 7 12 10 18 10 10 (1 pt) a. What is the modal value? b. What is the median value? C. What is the mean value? Please round to 2 decimal points, if necessary. 8. In a sample of 10 students, the mean score of a test is 10 with the standard deviation of 4.08. If we add 4 to each of the scores, (1 pt) a. What effect will this have on the mean of these scores? (Increase, decrease, or remain the same; if increase/decrease, by how much?) b. What effect will this have on standard deviation of these scores? (increase, decrease, or remain the same; If Increase/decrease, by how much?)