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[Steps Shown] The U.S. Environmental Protection Agency developed a program to test motor vehicle emission levels. The historical data suggests that the

Question: The U.S. Environmental Protection Agency developed a program to test motor vehicle emission levels. The historical data suggests that the level of nitrogen oxide (NO x ) fits a normal distribution. NO x is considered a major contributor of smog. The mean for this distribution is 1.5 NO x , with a standard deviation of 0.4 NO x.

  1. Write out the hypotheses for this study.
  2. What is the probability that a randomly selected vehicle will have a nitrogen oxide level of less than 1.0 NO x ?

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