A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that the process standard deviation is two ounces. Each day last week, he randomly selected four packages and weighed each. The data from that activity appears below.
(a) Calculate all sample means and the mean of all sample means.
(b) Calculate upper and lower control limits that allow for natural variations.
(c) Is this process in control?
Definitions:
Younger Child
A term typically used to refer to the child or children in a family who are younger than their siblings, focusing on their unique developmental and social positions within the family dynamics.
School-Age Children
Refers to children typically between the ages of 5 and 18 who attend kindergarten through high school.
Lots of Friends
Having a wide circle of acquaintances or companions with whom one shares a bond of mutual affection.
Preschoolers
Children who are in the age group typically ranging from 3 to 5 years old, just before they enter formal schooling.
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