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The average monthly gasoline purchase for a family with 2 cars is 90 gallons. This statistic has a normal distribution with a standard deviation of 10 gallons. A family is chosen at random.
a) Find the probability that the family's monthly gaoline purchases will be between 88 and 98 gallons.
b) Find the probability that the family's monthly gasoline purchases will be less than 100 gallons.
c) Find the probability that the family's monthly gasoline purchases will be more than 78 gallons
What linear transformation will change sixth grade scores x into new scores xnew= a+bx that have the desired mean and standard deviation?
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Give null and alternative hypotheses for this test in symbolic form.
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How many commercials' worth of data do I need to have a margin of error no more than 3, the correct set of hypotheses
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