= Homework: Section 3.4 Homework Question 4, 3.4.14
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 are coming off assembly line have a mean length of 15cm with a
standard deviation of 0.10 cm. For what lengths will a bolt be destroyed?
Select the correct choice below and fill in the answer box(es) to complete your choice
(Round to one decimal place as needed.)
O A. A bolt will be destroyed if the length is less than
cm
OB. A bolt will be destroyed if the length is less than
cm or greater than
cm
OC. A bolt will be destroyed if the length is greater than
cm
OD. A bolt will be destroyed if the length is between
cm and
cm