Is it a true-experiment or quasi-experiment or correlational research? An educational psychologist is interested in the effects of tutoring on exam performance. She divides a class of 10th graders into two groups: one would attend weekly tutoring sessions and the other group would receive no tutoring.A population of scores has a mean of = 10, a median of 35, and a mode of 60. What is the the most likely shape for the population distribution negatively skewed positively skewed bimodal symmetric unimodal symmetric