Jessica Salas,president of Salas Products,is Reviewing the Warranty Policy for Her

Multiple Choice

Jessica Salas,president of Salas Products,is reviewing the warranty policy for her company's new model of automobile batteries. Life tests performed on a sample of 100 batteries indicated: (1) an average life of 75 months,(2) a standard deviation of 5 months,and (3) a bell shaped battery life distribution.What percentage of the batteries will fail within the first 65 months of use?

A) 0.5%
B) 1%
C) 2.5%
D) 5%
E) 7.5%