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