A Quality Analyst Wants to Construct a Sample Mean Chart

question 143

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 appears 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,what is the probability of concluding that this process is out of control when it is actually in control?
(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:

Task And Interpersonal

Describes two distinct but interrelated aspects of team or group dynamics, where 'task' refers to the activities and work performed, and 'interpersonal' refers to the relationships and interactions between members.

Status And Power

The relative standing or position of individuals or groups in a social hierarchy, and the ability to influence others or control resources.

Dark Triad

A set of three personality traits: narcissism, Machiavellianism, and psychopathy, which are considered socially malevolent and interpersonally destructive.

Narcissism

A personality trait characterized by a long-term pattern of exaggerated self-importance, need for admiration, and a lack of empathy for others.