Below is a frequency distribution of earnings of 50 contractors in a country. $$\begin{array} { c c }
\begin{array} { c }
\text { Earnings } \

\end{array} & \text { Number of } \
\text { (thousands) }& \text { Contractors } \
1 - 10 & 2 \
11 - 20 & 7 \
20 - 30 & 12 \
31 - 40 & 15 \
41 - 50& 8 \
50 - 60 & 6
\end{array}$$ Regarding this distribution, which of the following is correct?
A)The frequency distribution contains too many class intervals.
B)The class interval limits are ambiguous.
C)Too few classes were chosen.
D)The class intervals are too wide.

Question

Below is a frequency distribution of earnings of 50 contractors in a country. $$\begin{array} { c c } 
\begin{array} { c } 
\text { Earnings } \

\end{array} & \text { Number of } \
\text { (thousands) }& \text { Contractors } \
1 - 10 & 2 \
11 - 20 & 7 \
20 - 30 & 12 \
 31 - 40 & 15 \
41 - 50& 8 \
50 - 60 & 6
\end{array}$$ Regarding this distribution, which of the following is correct?
A)The frequency distribution contains too many class intervals.
B)The class interval limits are ambiguous.
C)Too few classes were chosen.
D)The class intervals are too wide.

Quizplus · Accepted Answer

The class interval from 20 - 30 overlaps with the interval from 11 - 20, making the limits ambiguous because it's unclear whether a contractor earning exactly 20 should be counted in the first or the second interval.

Below Is a Frequency Distribution of Earnings of 50 Contractors