A Retail Store Wants to See If the Accuracy of the Prices

Essay

A retail store wants to see if the accuracy of the prices that were entered into its database used for its cash registers is in control.It has collected 10 samples of size 500.The number of errors is found in the table below.Construct a 3-sigma p-chart to determine if this entry process is in control.
$$\begin{array} { | c | c | } \hline \begin{array} { c } \text { Sample } \\\text { Number }\end{array} & \begin{array} { c } \text { Wrong Price } \\\text { Entries }\end{array} \\\hline 1 & 5 \\2 & 2 \\3 & 7 \\4 & 1 \\5 & 3 \\6 & 2 \\7 & 8 \\8 & 1 \\9 & 3 \\10 & 4 \\\hline\end{array}$$