Use the Given Process Data to Construct a Control Chart $\begin{array} { l l l l l l l l l l l l l l l l l l l l } 4 & 4 & 5 & 5 & 5 & 5 & 5 & 6 & 6 & 6 & 6 & 12 & 6 & 6 & 6 & 7 & 6 & 7 & 8 & 7 \end{array}$

Multiple Choice

Use the given process data to construct a control chart for p. A drugstore considers a wait of more than 5 minutes to be a defect. Each week 100 customers are randomly selected and
Timed at the checkout line. The numbers of defects for 20 consecutive weeks are given below. $\begin{array} { l l l l l l l l l l l l l l l l l l l l } 4 & 4 & 5 & 5 & 5 & 5 & 5 & 6 & 6 & 6 & 6 & 12 & 6 & 6 & 6 & 7 & 6 & 7 & 8 & 7 \end{array}$
What is the value of the upper control limit?

A) 1
B) $0.0783$
C) $0.0622$
D) $6.2$