A Quality Analyst Wants to Construct a Sample Mean Chart

question 49

Essay

A quality analyst wants to construct a sample mean chart for controlling a packaging process.He knows from past experience that when the process is operating as intended,packaging weight is normally distributed with a mean of twenty ounces,and a process standard deviation of two ounces.Each day last week,he randomly selected four packages and weighed each.The data from that activity appear below.
(a)If he sets an upper control limit of 21 and a lower control limit of 19 around the target value of twenty ounces,the control chart is based on what value of z?
(b)With the UCL and LCL of part a,what do you conclude about this process-is it in control?

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Definitions:

Conventional Reasoning

A stage in moral development where individuals make judgments based on societal norms and the expectations of others.

Care Orientation

Gilligan’s feminine mode of moral reasoning, characterized by a desire to maintain relationships and a responsibility to avoid hurting others.

Justice Orientation

A male mode of moral reasoning proposed by Gilligan that emphasizes the abstract principles of fairness and individualism.

Social Responsibility

The idea that individuals and organizations have an obligation to act for the benefit of society at large, promoting a positive impact on social, environmental, and economic factors.