Mrs. Crabapple has a class with three students, and she has had four quizzes so far this semester. She has created control charts to determine if the variation in students' scores from quiz to quiz is exhibiting only natural variation. Each of the quiz scores is shown below. The upper and lower control limits for the x chart are 109.6 and 34.9, respectively. The upper and lower control limits for the R chart are 93.95 and 0, respectively.
Is the process in a state of control?
Definitions:
Inconsistent Person
Someone whose actions, beliefs, or performance vary significantly over time, often unpredictably.
Stamped Feet
The act of forcefully bringing one's feet down onto the ground, often to express frustration or to attract attention.
Winning Point
The final score or action that clinches victory in a game or competition.
Publicity Potential
The capacity or likelihood of a product, event, or person to attract media attention or public interest.
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