A Quality Analyst Wants to Construct a Control Chart for Determining

question 57

Multiple Choice

A quality analyst wants to construct a control chart for determining whether three machines, all producing the same product, are under control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results: $$\begin{array} {r } { \text { Measurements } } \\\begin{array} { l l l l l } \text { Machine } & \\\hline \# 1 & 17 & 15 & 15 & 17 \\\# 2 & 16 & 25 & 18 & 25 \\\# 3 & 23 & 24 & 23 & 22\end{array}\end{array}$$ What is the sample mean for machine #1?

• A) 15
• B) 16
• C) 17
• D) 21
• E) 23

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Definitions:

Atherosclerosis

The formation of plaque within the arteries.

Arteriosclerosis

A condition marked by loss of elasticity and hardening of arteries.

Cardiac Attack

Also known as a heart attack, it occurs when the flow of blood to the heart is blocked, causing heart muscle to be damaged or die.

Oxygenated Blood

Blood that is rich in oxygen, typically found in arteries, having been oxygenated in the lungs.