Yes.
4) The mode of a set is the value that occurs most often in the set. In this case, the mode would be 4.4, meaning that you are right.
5) This problem is asking you to compare the number of second graders who like chocolate ice cream compared to the number of second graders who enjoy strawberry ice cream. In this case, there are about 20 second graders who enjoy chocolate ice cream and 10 who enjoy strawberry ice cream, meaning that there are about 10 more that enjoy chocolate ice cream.