Refer to the Table Which Summarizes the Results of Testing

question 19

Multiple Choice

Refer to the table which summarizes the results of testing for a certain disease. $$\begin{array} { l | c c } & \begin{array} { l } \text { Positive } \\\text { Test Result }\end{array} & \begin{array} { l } \text { Negative } \\\text { Test Result }\end{array} \\\hline \begin{array} { l } \text { Subject has the disease } \\\text { Subject does not have the } \\\text { disease }\end{array} & 111 & 4 \\& 11 & 172\end{array}$$ If one of the results is randomly selected, what is the probability that it is a false negative (test indicates the person does not have the disease when in fact they do) ? What does this
Probability suggest about the accuracy of the test?

• A) 0.0369; The probability of this error is low so the test is fairly accurate.
• B) 0.0348; The probability of this error is low so the test is fairly accurate.
• C) 0.591; The probability of this error is high so the test is not very accurate.
• D) 0.0134; The probability of this error is low so the test is fairly accurate.

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Definitions:

Exam Scores

Numerical outcomes derived from academic tests, reflecting the performance or knowledge level of the examinees.

Distribution

In statistics, distribution refers to the way in which data is spread out or dispersed across a range of values.

Relative Frequency Histogram

A type of histogram which shows the relative frequencies of different values within a dataset.

Data Set

A collection of related sets of information that is composed of separate elements but can be manipulated as a unit by a computer.