6. A major car manufacturer wants to test a new engine to determine whether it meets new air pollution standards. The mean emission, I of all engines of this type must be approximately 20 parts per million of carbon. If it is higher than that, the manufacturer will have to redesign parts of the engine. Ten engines are manufactured for testing purposes, and the emission level of each is determined. Based on data collected over the years from a variety of engines, it seems reasonable to assume that emission levels are roughly Normally distributed with o = 3 parts per million of carbon. The data result in an average of 22 parts per million. What is the value of the test statistic?

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6. A major car manufacturer wants to test a new engine to determine whether it meets new air
pollution standards. The mean emission, u of all engines of this type must be approximately
20 parts per million of carbon. If it is higher than that, the manufacturer will have to redesign
parts of the engine. Ten engines are manufactured for testing purposes, and the emission level of
each is determined. Based on data collected over the years from a variety of engines, it seems
reasonable to assume that emission levels are roughly Normally distributed with o = 3 parts per
3D3
%3D
million of carbon. The data result in an average of 22 parts per million. What is the value of the
test statistic?
Transcribed Image Text:6. A major car manufacturer wants to test a new engine to determine whether it meets new air pollution standards. The mean emission, u of all engines of this type must be approximately 20 parts per million of carbon. If it is higher than that, the manufacturer will have to redesign parts of the engine. Ten engines are manufactured for testing purposes, and the emission level of each is determined. Based on data collected over the years from a variety of engines, it seems reasonable to assume that emission levels are roughly Normally distributed with o = 3 parts per 3D3 %3D million of carbon. The data result in an average of 22 parts per million. What is the value of the test statistic?
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