Question

Question 6 Not yet answered Points out of 4.00 P Flag question Diagnostic tests of medical conditions have several results. The rest result can be positive or negative. A positive test (+) indicates the patient has the condition. A negative test () indicates the patient does not have the condition. Remember, a positive test does not prove the patient has the condition. Additional medical work may be required. Consider a random sample of 137 patients, some of whom have a medical condition and some of whom do not. Results of a new diagnostic test for the condition are shown. Test Result Test Result Column Total Assume that the sample is representative of the entire population. For a person selected at random, find P(getting test result or condition present). Round your answer to the nearest hundredth. Condition Present 119 18 137 Condition Absent 18 46 64 Row Total 137 64 201 Select one a. 0.28 O b. none of these choices O C. 0.13 O d. 0.91 O e. 0.09

Answer 1

We want to find,

P(getting test result - OR condition present)

= P(getting test result -) + P(condition present) - P(getting test result - AND condition present)

= (64/201) + (137/201) - (18/201)

= 183/201

= 0.91

P(getting test result - OR condition present) = 0.91

Answer: d) 0.91