A Design Engineer Wants to Construct a Sample Mean Chart

question 104

Multiple Choice

A design engineer wants to construct a sample mean chart for controlling the service life of one of the types of light bulbs 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 bulbs,with these results: What value should be used as the mean of the sampling distribution of sample means?

• A)470 hours
• B)495 hours
• C)500 hours
• D)515 hours
• E)525 hours

Recognize the utility of diagrams and templates in organizing and presenting information.

Grasp the fundamental concepts of database management systems.

Gain insight into the functions and features of spreadsheet software.

Understand the basic principles of genetic inheritance and patterns.

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Definitions:

Demand Curve

A graph showing the relationship between the quantity of a good that consumers are willing to buy and its price.

Positive Relationship

A relationship between two variables in which an increase in the value of one variable is associated with an increase in the value of the other variable. It is illustrated by a curve that slopes upward from left to right.

Quantity of Lemonade

The amount of lemonade produced or available for sale at any given time.

Cups Per Day

A measurement unit often used in dietary or consumption studies, indicating the number of cups of a substance (such as coffee or tea) consumed daily.