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
Kindergarten 18, 20. 21, 19, 22
20
1.2
27, 32, 33, 33, 35
32
2
Seventh
grade
Based on these data, which statement is true?
O A. Every seventh-grade class has 12 more students than a
kindergarten class.
B. The average size of a seventh-grade class is larger but varies less
than that of a kindergarten class.
C. The recommended number of students in a kindergarten class is
20.
D. The average size of a seventh-grade class is larger and varies
more than that of a kindergarten class.