Consider the following frequency distribution: $$\begin{array} { l c }
\text { Class Interval } & \text { Frequency } \
10 \text {-under } 20 & 15 \
20 \text {-under } 30 & 25 \
30 \text {-under } 40 & 10
\end{array}$$
What is the midpoint of the first class?
A)10
B)20
C)15
D)30
E)40

Question

Consider the following frequency distribution: $$\begin{array} { l c } 
\text { Class Interval } & \text { Frequency } \
10 \text {-under } 20 & 15 \
20 \text {-under } 30 & 25 \
30 \text {-under } 40 & 10
\end{array}$$
What is the midpoint of the first class?
A)10
B)20
C)15
D)30
E)40

Quizplus · Accepted Answer

The midpoint of a class interval is calculated by adding the lower limit to the upper limit of the class and then dividing by 2. For the first class interval (10-under 20), the midpoint is (10 + 20) / 2 = 15.

Consider the Following Frequency Distribution What Is the Midpoint of the First Class? A)10 B)20

Consider the Following Frequency Distribution What Is the Midpoint of the First Class?
A)10
B)20