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In a statewide poll of 1,500 teenagers, 77% said that they liked motorcycles. The next month, in another statewide poll of 1,500 randomly selected teenagers, 75% responded that they liked motorcycles .
a. Does the polling evidence support the claim that the popularity of motorcycles among teenagers declined over the span of one month as seen by the results of the two polls? Explain why or why not.
b. Identify the population parameter the two polls were attempting to measure using statistic terminology.
c.What is the difference between a statistic and a parameter?
d. Based on the two polls, what would you say to someone who guessed that the population parameter the polls are trying to measure is really only 50%?
According to the 1990 U.S. Census, about 80% of men aged 20 to 24 have never been married. In a random sample of 40 men aged 20 to 24, how many unmarried men.
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You are the manager of a factory that produces Mini-Oats Cereal. The factory has an automated packaging machine that can be set at any targeted fill level between 12 and 32 ounces.
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