A company collected the ages from a random sample of its middle managers with the resulting frequency distribution shown below:
$$\begin{array} { l r }
\text { Class Interval } & \text { Frequency } \
20 \text { to }

Question

A company collected the ages from a random sample of its middle managers with the resulting frequency distribution shown below:
$$\begin{array} { l r } 
\text { Class Interval } & \text { Frequency } \
20 \text { to } < 25 & 8 \
25 \text { to } < 30 & 6 \
30 \text { to } < 35 & 5 \
35 \text { to } < 40 & 12 \
40 \text { to } < 45 & 15 \
45 \text { to } < 50 & 7
\end{array}$$
-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 the third class interval (30 to <35) is calculated by averaging the lower and upper bounds: $(30 + 35) / 2 = 32.5$.

A Company Collected the Ages from a Random Sample of Its