Question

The Copper River school district collected data about class
size in the district. The table shows the class sizes for five
randomly selected seventh- and eighth-grade classes,
Number of students in randomly Mean Mean absolute
selected class
deviation
Seventh 30, 31, 32, 34, 38
33 24
grade
Elghth 26, 27, 29, 32, 36
30
grade
3.2
Based on these data, which statement is true?
A. The average size of an eighth-grade class is smaller and varies
less than that of a seventh grade class.
B. The average size of an eighth grade class is smaller and varies
more than that of a seventh grade class.
C. Every seventh grade class has 3 more students than an eighth
grade class

D. The recommended number of students in an eighth-grade class is 30

Please help first to answer and the answer is correct will get brainlist list and a lot of points so please hurry and answer!!!

Answer 1

The correct statement is A that is The average size of an eighth-grade class is smaller and varies less than that of a seventh-grade class.

What are mean?

The mean is the average value which can be calculated by dividing the sum of observations by the number of observations.

The mean of the seventh grade is given as 33.

The mean of the eighth grade is given as 30.

The correct statement is A because the mean absolute deviation of an eighth-grade class is less than that of a seventh-grade class.

Also, the class size is larger on average for seventh-grade classes (33 > 30).

Learn more about mean;

https://brainly.com/question/17060266

#SPJ1