The height in inches of two different groups of students in Mrs. zamensky's class are listed below group A: 51,53,60,64,55

group B: 50,55,58,63,52

which statement is true about the height of each group of students

Group A has a greater variability in students heights.
Group B has a greater mean for the students Heights.
the variability in students Heights of both group in the same.
the mean for the heights of both groups of students is the same

70 points ! pls 2. given the following two sets of data what is the union of the two sets and what is the intersection of the two sets. set a = {1, 2, 3, 4, 5, 6, 7, 8, 9} set b = {2, 4, 6, 8, 10, 12, 14} 3. given a regular deck of cards. describe a way of pulling cards that would create a dependent event and then one that would create an independent event. 4. what is the probability of drawing a red card and then drawing a spade without replacing the card that was drawn first?