A Blood Pressure Measurement Consists of Two Numbers: the Systolic

question 10

Multiple Choice

A blood pressure measurement consists of two numbers: the systolic pressure, which is the maximum pressure taken when the heart is contracting, and the diastolic pressure, which is the Minimum pressure taken at the beginning of the heartbeat. Blood pressures were measured, in Millimeters of mercury (mmHg) , for a sample of eight adults. The following table presents the
Results.
$\begin{array} { c c } \text { Systolic } & \text { Diastolic } \\127 & 92 \\125 & 94 \\135 & 87 \\110 & 75 \\123 & 89 \\121 & 87 \\118 & 87 \\127 & 93\end{array}$
The least-squares regression equation is $y = 18.7841 + 0.5616 x$ . If the systolic pressures of two patients Differ by 8 mmHg, by how much would you predict their diastolic pressures to differ?

• A) 8.56 mmHg
• B) 4.49 mmHg
• C) 0.56 mmHg
• D) 0.07 mmHg

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