Questlon y ot 10 The Ridgeport school district collected data about class
size in the district. The table shows the class sizes for five
randomly selected kindergarten and seventh-grade
classes.
Number of students in
randomly selected class
Mean Mean
absolute
deviation
22
3.6
Kindergarten 19, 19. 23, 30, 19
Seventh 27, 33, 34, 30, 31
grade
31
2.0
Based on these data, which statement is true?
O A. Every seventh-grade class has 9 more students than a
kindergarten class.
O B. The average size of a seventh-grade class is larger and varies
more than that of a kindergarten class.
O C. The average size of a seventh-grade class is larger but varies less
than that of a kindergarten class.
O D. The recommended number of students in a kindergarten class is
22.