Use the Grouped Data Formulas to Find the Indicated Mean

question 13

Multiple Choice

Use the grouped data formulas to find the indicated mean or standard deviation.
-A random sample of 25 community service projects is selected and the scores are recorded. The results are shown in the histogram. Estimate the sample mean.

• A)97.1
• B)97.3
• C)96.9
• D)96.7

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Definitions:

Brachiocephalic Arteries

Major blood vessels originating from the aortic arch that supply blood to the right arm and the head and neck.

Tunica Intima

The innermost layer of an artery or vein, consisting of a thin layer of endothelial cells that line the interior surface of the vessel.

Blood Vessel Walls

The structured layers composing the sides of arteries, veins, and capillaries, responsible for maintaining blood pressure and controlling blood flow.

Tunica Media

The middle layer of the wall of a blood vessel or hollow organ, consisting primarily of smooth muscle cells and elastic fibers.