HCH$\text{'}$s assembly unit has decided to use a $p-$Chart with $2-$sigma control limits to monitor the proportion of defective copper wires produced by their production process. The quality control manager randomly samples $100$ copper wires at $16$ successively selected time periods and counts the number of defective copper wires in the sample.

Table

Control Chart

Step $1$ of $8$: What is the Center Line of the control chart? Round your answer to three decimal places.