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In a recent investigation,the National Highway Traffic Safety Administration (NHTSA)found that the Chevrolet Volt and other electric vehicles do not pose a greater risk of fire than gasoline-powered vehicles (The Boston Globe,January 25,2012).Specifically,it was determined that "no discernible defect trend exists." Suppose a consumer advocacy group wants to verify some of these claims by constructing a chart.The group expects 2% of electric cars to catch fire each month.For each of the last six months,500 electric car owners are asked if their cars have caught fire.The following sample proportions are obtained:
0.010 0.020 0.015 0.030 0.025 0.015
A)Assuming that the group expectation is correct,construct the centerline and the upper and lower control limits for the chart.
B)Do the consumer group's findings support those of the NHTSA? Explain.
External Factors
Elements outside an organization or individual's control that can impact their performance, decision-making, and strategies.
Internal Personal Factors
The psychological or physiological aspects within an individual that influence their behavior, choices, and interactions.
Positive Reinforcement
Positive reinforcement strengthens a behavior by making a desirable consequence contingent on its occurrence.
Successive Approximations
A technique in behavior modification where desired behaviors are gradually learned through a series of steps that get closer to the target behavior.
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