Engineers want to design seats in commercial aircraft so that they are wide enough to fit

90% of all males. (Accommodating 100% of males would require very wide seats that would be much too expensive.) Men have hip breadths that are normally distributed with a mean of

14.8in. and a standard deviation of 1.1 in. Find P90.

That is, find the hip breadth for men that separates the smallest 90% from the largest 10%.

The hip breadth for men that separates the smallest 90% from the largest 10% is

P90=nothing in.

(Round to one decimal place as needed.)