A) 126
B) 14
C) 14

question 45

Multiple Choice

$$\begin{array}{l}\text { Use the given frequency distribution to approximate the mean. }\\\begin{array} { c c } \hline \text { Class } & \text { Frequency } \\\hline 0 - 9 & 18 \\10 - 19 & 18 \\20 - 29 & 9 \\30 - 39 & 9 \\40 - 49 & 9\end{array}\end{array}$$

• A) 12.6
• B) 14
• C) 14.1
• D) 20.7

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Definitions:

Cardiac Output

The volume of blood the heart pumps through the circulatory system in one minute, a critical measure of heart function and efficiency.

Stroke Volume

The amount of blood the heart ejects with each beat, a key component in determining cardiac output.

Venous Return

Volume of blood returning to the heart.

Stroke Volume

The amount of blood ejected by the left ventricle of the heart in one contraction.