A Group of Biomedical Researchers Developed a Diagnostic Process That

question 340

Multiple Choice

A group of biomedical researchers developed a diagnostic process that applies the same shortwave rays used in airport security scanners to distinguish cancerous skin lesions from normal skin.  The technology uses millimeter-wave radiation, which bounces off different materials with quantifiable reflectivity signatures.  The researchers found that cancerous tumors reflect more calibrated energy than normal skin; therefore, the technology identifies diseased tissue by detecting reflectivity hotspots.  A preliminary evaluation of the performance of the diagnostic tool showed that 92% of all skin tissue samples with a positive test result were cancerous, and that 99% of all skin tissue samples with a negative test result were normal.  Based on these preliminary data, which of the following is the most accurate interpretation of the results?

• A)92% is the false-positive rate, and 99% is the false-negative rate
• B)92% is the positive likelihood ratio of the test, and 99% is the negative likelihood ratio of the test
• C)92% is the positive predictive value of the test, and 99% is the negative predictive value of the test
• D)92% is the sensitivity of the test, and 99% is the specificity of the test

---

Definitions:

Gantt Chart

A visual tool used for project management, displaying tasks, durations, and dependencies along a timeline.

Unavailable Data

Information that cannot be accessed or retrieved, often due to privacy, loss, or technical constraints.

Column Totals

The sum of all numerical entries in a given column in a table or spreadsheet.

Textual Visuals

Visual elements such as charts, graphs, or images included in texts to aid understanding or add interest.