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Q1 TheNissanLeaf(Leading,Environmentallyfriendly,Affordable,Familycar)isafivedoorhatchback electriccarmanufacturedbyNissanandintroducedin2010.ThecombinedfueleconomyoftheNissanis99milespergallon(mpg)gasolineequivalent.AssumethempgfortheNissanLeafisnormallydistributedwithmean99andstandarddeviation8,N(99,8). For quality control, Nissan randomly samples cars produced each day to test their mpg. Each random sample contains 15 cars. For the
Q1TheNissanLeaf(Leading,Environmentallyfriendly,Affordable,Familycar)isafivedoorhatchback electriccarmanufacturedbyNissanandintroducedin2010.ThecombinedfueleconomyoftheNissanis99milespergallon(mpg)gasolineequivalent.AssumethempgfortheNissanLeafisnormallydistributedwithmean99andstandarddeviation8,N(99,8). For quality control, Nissan randomly samples cars produced each day to test their mpg. Each random sample contains 15 cars.
- For the random sample of 15 cars, what is the expected value of the sample average:
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