A Design Engineer Wants to Construct a Sample Mean Chart

question 70

Multiple Choice

A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company produces. He knows from numerous previous samples that this service life is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On three recent production batches, he tested service life on random samples of four headlamps, with these results: $$\begin{array} { r } { \text { Service Life (hours) } }\\\begin{array} { l l l l l } \text { Sample } & \\\hline 1 & 495 & 500 & 505 & 500 \\2 & 525 & 515 & 505 & 515 \\3 & 470 & 480 & 460 & 470\end{array}\end{array}$$ What is the sample mean service life for sample 2?

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Definitions:

Atlanta Compromise

A speech delivered by Booker T. Washington in 1895 advocating for African American economic progress and education as a route to racial equality, while suggesting a temporary acceptance of segregation.

Gunnar Myrdal

A Swedish economist and sociologist known for his influential study on race relations in the United States, titled "An American Dilemma" (1944).

Segregation

The action or state of setting someone or something apart from others, often based on racial, sexual, or religious discrimination.

Harassment

Unwanted and unwelcoming behavior that includes bullying, discrimination, and sexual harassment, creating a hostile environment for the victim.