Five data entry operators work at the data processing department of the Birmingham Bank. Each day for 30 days, the number of defective records in a sample of 350 records typed by these operators has been noted, as follows:

a) Establish 3 upper and lower control limits.

UCLp = (enter your response as a number between 0 and 1, rounded to three decimal places).

LCPp =(enter your response as a number between 0 and 1, rounded to three decimal places).

b) Why can the lower limit not be a negative number?

A.

Since the percent of defective records cannot be a negative number.

B.

Since the upper control limit is positive.

C.

Since the upper control limit cannot be a negative number.

D.

Since the percent of defective records is always a positive number.

c) The industry standard for the upper control limit is 0.10. What does this imply about Birmingham Bank's own standards?

The industry standard is _______the standard at Birmingham Bank.

\begin{tabular}{cc|cc|c|c} \hline Sample No. & No. Defectives & Sample No. & No. Defectives & Sample No. & No. Defectives \\ \hline 1 & 8 & 11 & 7 & 21 & 17 \\ 2 & 5 & 12 & 4 & 22 & 12 \\ 3 & 19 & 13 & 15 & 23 & 5 \\ 4 & 9 & 14 & 3 & 24 & 6 \\ 5 & 10 & 15 & 10 & 25 & 12 \\ 6 & 7 & 16 & 9 & 26 & 10 \\ 7 & 12 & 17 & 13 & 27 & 13 \\ 8 & 9 & 18 & 4 & 28 & 5 \\ 9 & 6 & 19 & 18 & 29 & 11 \\ 10 & 14 & 20 & 16 & 30 & 4 \\ \hline \end{tabular}