Answer Happy

Ir formation For Questions 8-10 consider this hypothetical information: It can be difficult to differentiate mild dementia from normal memory loss or the temporary effects of illness and/or medications in the elderly. Suppose a study used a QuickieTest to save money. The table below compares the results of this test among a group of nonimpaired elderly to test results from a group with mild dementia (as diagnosed by a gold standard). No. of items checked on Percent of elderly with mild dementia Percent of elderly with NO dementia Quickie Test who checked... who checked... 10 0% 22% 1 10% 28% 2 3 1% 12% 10% 16% 16% 12% 4 5 18% 6 6% 10% 10% 10% 25% 24% 20% 7 8 Q8 If the researchers used a cutoff of more than five items checked on the QuickieTest as a positive test for mild dementia, what would be the sensitivity of the test? Select one: O a. 6% b. 31% O c. 69% O d. 94% 09 If the researchers used a cutoff of more than four items checked on the QuickieTest as a positive result for mild dementia, what would be the specificity of the test? Select one: O a. 100% b. 94% O c. 13% O d. 0% Q 10 If 50% of the population being screened has mild dementia, what is the positive predictive value for a cutoff of more than four checked questions being considered a positive test?