A Group of Psychiatrists Has Noticed an Unusual Number of Older

question 71

Multiple Choice

A group of psychiatrists has noticed an unusual number of older individuals with depression in the surrounding community.  A decision is taken to conduct a cross-sectional study to estimate the prevalence of depression in this specific population.  Estimates for the prevalence of depression (cases per 100 individuals) in the community are as follows: Suppose during an afternoon clinic, a psychiatrist sees a 65-year-old woman, a 72-year-old man, and an 84-year-old woman from this community.  Assuming no relation between the 3 patients, what is the probability that none of them has depression?

• A)0.001
• B)0.011
• C)0.295
• D)0.705
• E)0.999

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Definitions:

Active Transport

The movement of molecules across a cell membrane from a region of lower concentration to higher concentration, requiring energy.

Facilitated Diffusion

A process of passive transport, as opposed to active transport, where molecules move across a membrane with the assistance of transport proteins, without energy expenditure.

Eggshell Membrane

The thin layer between the eggshell and the egg white, rich in protein and collagen, often used in dietary supplements and cosmetic products.

Albumin

A protein found in blood plasma that helps maintain osmotic pressure and transport substances.