Find the Indicated Probability What Is the Probability That a Randomly Selected Person Was

question 206

Multiple Choice

Find the indicated probability.
-The following table show the results of a clinical trial for an allergy drug. $$\begin{array} { l | c | c | c | c } & \begin{array} { c } \text { Allergy } \\\text { drug }\end{array} & \text { Placebo } & \begin{array} { c } \text { Control } \\\text { (no treatment) }\end{array} & \text { Total } \\\hline \text { Improvement } & 145 & 85 & 41 & 271 \\\text { No improvement } & 55 & 115 & 59 & 229 \\\text { Total } & 200 & 200 & 100 & 500\end{array}$$ What is the probability that a randomly selected person was given a placebo and improved? Round your answer to the nearest thousandth when necessary.

• A)0.17
• B)0.69
• C)0.942
• D)0.772

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A conceptual placement or orientation of a part or component for purposes of design analysis or assembly consideration.

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The automated control of machining tools and other equipment in a manufacturing process via a computer.

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A coordinate system where each point is defined by an ordered pair of perpendicular lines, one measuring the horizontal (x) and the other the vertical (y) displacement.

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The process of specifying part sizes, locations, and features on technical drawings for precision manufacturing or assembly.