Use the Following Information for Following Questions

Multiple Choice

Use the following information for following questions . The mean time it takes for workers at a factory to insert a
delicate bolt into an engine is 15 minutes. The standard deviation of time to insert the bolt is 4.0 minutes and the
distribution of time is approximately normally distributed.
-97.5% of the time, the bolt is inserted in less than which time value? Round to the nearest whole number.

A) 23 minutes
B) 19 minutes
C) 7 minutes
D) 15 minutes