Glaucoma is a disease of the eye that is manifested by high intraocular pressure. The distribution of intraocular pressure in the general population is approximately normal with mean 16 mm Hg and standard deviation 3 mm Hg.

(a)What percentage of people have an intraocular pressure lower than 14 mm Hg?

(b)Fill in the blank. Approximately 80% of adults in the general population have an intraocular pressure that is greater than ________ (how many?) mm Hg.

NOTE: Do not use the first half of the normal table (i.e., page 742 in the textbook, with negative z-values) because it will not be provided with the tests.