15M Multiple choice questions 81 to 86 (Each answer is true or false) 81. The re
ID: 3311581 • Letter: 1
Question
15M Multiple choice questions 81 to 86 (Each answer is true or false) 81. The repeatability or precisi of measurements ay be measured by: a) the coeflicient of variation of repeated measurements; b etdard deviation of measurements betwee subjects; c) t S1. e standard deviation of the difference between pairs of measurements the standard deviation of rep eated measurements within subjects; difference between the means of two sets of measurements on te se set of subjects. (e) 82. The specificity of a test for a disease: a Standard error derived from the Binobon; asures how well the test, detects cases of the disense; s how well the test. excludes stubjects without the disease: res how often a correct diagnosis is obtained fro the test; all we need to tell us how good the test is.Explanation / Answer
Ans:
81)
Option d is correct.
Repeatability or test–retest reliability is the variation in measurements taken by a single person or instrument on the same item, under the same conditions, and in a short period of time. A less-than-perfect test–retest reliability causes test–retest variability.
Repeatability is defined as the standard deviation of the individual measurements.
82)
Option c is correct.
measures how well the test excludes subjects without the disease
In medical diagnosis, test sensitivity is the ability of a test to correctly identify those with the disease (true positive rate), whereas test specificity is the ability of the test to correctly identify those without the disease(true negative rate)