Twelve teachers attended a seminar on mathematical problem solving. Their attitudes were measured before and after the seminar. A positive number change attitude indicates that a teacher's attitude toward math became more positive. The twelve change scores are as follows: 3 8 -1 2 0 5 -3 1 -1 6 5 -2 Sketch a dotplot of the data. Describe the dotplot. What are the advantages and disadvantages of using a dotplot versus a histogram to display data