Arthritis is an inflammation of one or more joints. The symptoms are pain and stiffness, which usually worsen with age. Suppose that an analysis of age and incidence of arthritis produced the following table of joint probabilities.

a. What is the probability that a person who is over 80 has arthritis?

b. Determine the probability that a person who is 55 years old does not have arthritis.

c. What is the probability that someone who has arthritis is between 60 and 70 years old?

Transcribed Image Text:

Does not have Arthritis Age Categories Has Arthritis .040 50-60 60-70 360 .225 .075 .072 .088 .035 70-80 .105 Over 80