A company collected the ages from a random sample of its middle managers,with the resulting frequency distribution shown below. What is the midpoint of the third class interval?
A)22.5
B)27.5
C)32.5
D)37.5
E)42.5

Question

A company collected the ages from a random sample of its middle managers,with the resulting frequency distribution shown below.  What is the midpoint of the third class interval?
A)22.5 
B)27.5 
C)32.5 
D)37.5 
E)42.5

Quizplus · Accepted Answer

The midpoint of a class interval is calculated by adding the lower class limit and upper class limit and dividing the sum by 2. The third class interval has lower class limit 30 and upper class limit 35. So, the midpoint is (30+35)/2 = 32.5. Therefore, the answer is C) 32.5.

A Company Collected the Ages from a Random Sample of Its