Consider the following information: $$\begin{array} { | l | c | c | c | c | c | c | }
\hline \text { Observations } & 1 & 2 & 3 & 4 & 5 & 6 \
\hline \text { Num. of defects } & 10 & 18 & 13 & 15 & 9 & 12 \
\hline
\end{array}$$
The number of runs up and down for the preceding data is:
A) 3.
B) 4.
C) 5.
D) 6.
E) none of these.

Question

Consider the following information: $$\begin{array} { | l | c | c | c | c | c | c | } 
\hline \text { Observations } & 1 & 2 & 3 & 4 & 5 & 6 \
\hline \text { Num. of defects } & 10 & 18 & 13 & 15 & 9 & 12 \
\hline
\end{array}$$
The number of runs up and down for the preceding data is:
A) 3.
B) 4.
C) 5.
D) 6.
E) none of these.

Quizplus · Accepted Answer

A "run" is defined as a sequence of consecutive observations that are either all increasing or all decreasing. Looking at the data above, we can see that there are 5 runs:
- Runs up: 10, 18, and 13
- Runs down: 15, 9, and 12
Therefore, the answer is choice (C) 5.

Consider the Following Information The Number of Runs Up and Down for the Preceding