A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.2 years, and standard deviation of 1.9 years. If 13 items are picked at random, 3% of the time their mean...

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.2 years, and standard deviation of 1.9 years.


If 13 items are picked at random, 3% of the time their mean life will be less than how many years?


Give your answer to one decimal place.