Question: Guarantee: Watches. Accrotime is a manufacturer of quartz crystal watches. Accrotime researchers have shown that the watches have an average life of 28 months before certain electronic components deteriorate, causing the watch to become unreliable. The standard deviation of watch lifetimes is 5 month, and the distribution of lifetimes is normal.

1. If Accrotime guarantees a full refund on any defective watch for 2 years after purchase, what percentage of total production will the company expect to replace?
   (where \(Z\sim N(0,1)\) ). That means that we expect to replace 21.19% of the total production.
2. If Accrotime does not want to make refunds on more that 12% of the watches it makes, how long should the guarantee period be (to the nearest month)?

Price: $2.99

Solution: The downloadable solution consists of 1 pages
Deliverable: Word Document