A manufacturer of bolts has a quality-control policy that requires it to destroy any bolts that are more than

2

standard deviations from the mean. The quality-control engineer knows that the bolts coming off the assembly line have mean length of

12

cm with a standard deviation of

0.05

cm. For what lengths will a bolt be destroyed?

Question content area bottom

Part 1

Select the correct choice below and fill in the answer box(es) to complete your choice.

(Round to one decimal place as needed.)

A.

A bolt will be destroyed if the length is less than

enter your response here

cm or greater than

enter your response here

cm.

B.

A bolt will be destroyed if the length is between

enter your response here

cm and

enter your response here

cm.

C.

A bolt will be destroyed if the length is less than

enter your response here

cm.

D.

A bolt will be destroyed if the length is greater than

enter your response here

cm.