The following class intervals for a frequency distribution were developed to provide information regarding the starting salaries for students graduating from a particular school: $\begin{array}{c}
\begin{array}{lll}
\text {Salary }\
(\$1,000s)\
\text {28 -under 31}\
\text {31-under 35}\
\text {34 -under 37}\
\text {39-under 40}
\end{array}
\begin{array}{c}
\text { Number of Graduates }\
\
-\
-\
-\
-\

\end{array}
\end{array}$

Before data were collected, someone questioned the validity of this arrangement.Which of the following represents a problem with this set of intervals?
A)There are too many intervals.
B)The class widths are too small.
C)The class widths are too large.
D)The second and the third interval overlap.
E)There are too few intervals.

Question

The following class intervals for a frequency distribution were developed to provide information regarding the starting salaries for students graduating from a particular school: $\begin{array}{c}
\begin{array}{lll}
\text {Salary }\
(\$1,000s)\
\text {28 -under 31}\
\text {31-under 35}\
\text {34 -under 37}\
\text {39-under 40}
\end{array}
\begin{array}{c}
\text { Number of Graduates }\
\
-\
-\
-\
-\

\end{array}
\end{array}$

Before data were collected, someone questioned the validity of this arrangement.Which of the following represents a problem with this set of intervals?
A)There are too many intervals.
B)The class widths are too small.
C)The class widths are too large.
D)The second and the third interval overlap.
E)There are too few intervals.

Quizplus · Accepted Answer

The second interval (31-under 35) and the third interval (34-under 37) overlap, meaning a salary of $34,000 would fall into both intervals, which is incorrect for a proper frequency distribution.

The Following Class Intervals for a Frequency Distribution Were Developed