**Question: **The life of one species of poplar tree is normally distributed with mean ? = 26 years and population standard deviation ? = 2.8 years.

a. If one tree is chosen at random, what is the probability it will live 28 years or more?

b. What is the probability that the average lifetime of sixteen (16) such trees will be 28 years or more?

**Solution:**The solution consists of 183 words (2 pages)

**Deliverables:**Word Document