Arecent study of the lifetimes of cell phones found the average of a certain brand is 36.5 months. The standard deviation is 4.6 months. If a company provides this brand to 33 employees, what is the...

Extracted text: Arecent study of the lifetimes of cell phones found the average of a certain brand is 36.5 months. The standard deviation is 4.6 months. If a company provides this brand to 33 employees, what is the mean lifetime of the sample for which 30% are above it?