30. Need Eyeglasses? A large number of adults are classified according to whether they were judged to need eyeglasses for reading and whether they actually used eyeglasses when reading. The proportions falling into the four categories are shown in the table. A single adult is selected from this group. Find the probabilities given here.

a. The adult is judged to need eyeglasses.

b. The adult needs eyeglasses for reading but does not use them.

c. The adult uses eyeglasses for reading whether he or she needs them or not.

d. An adult used glasses when they didn’t need them.

Transcribed Image Text:

Judged to Need Eyeglasses Yes No Used Eyeglasses for Reading Yes No .44 .14 .02 .40