2,5,5,6,1,5,7,4,5,9,6,8,5,5,4,3,3,4,8,7 complete following table: x f p percent a. how many people are in this date set? b. what percentage of students scored greater than 4? c. what proportion of students scored less than or equal to 6 d. what type of graph would you use for this date? draw the graph below