D Question 9 3 pts On the reading scale shown in the last question ( H = 49 and a = 6 ) , what is the reading score that separates the top 50 percent of scores from the bottom 50 percent? (Another way of asking, what is the raw reading score (X) a student would have to achieve to be at the 50th percentile ranking?) O X = 11 O X = 41 O X= 49 O X = 52 D Question 10 3 pts Professor Jim was interested in how the type of feedback received would affect the level of happiness in his students. The students were either praised or insulted and then the levels of happiness were measured by a questionnaire administered at the end of the study. What is the independent variable (I.V.) in this study? test scores O happiness O type of feedback O emotion level