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In 2005 the New Jersey Adult Tobacco Survey found that 22.5% of 464 blacks surveyed said that they smoked cigarettes while 18.3% of 2449 white respondents reported smoking.
a) Create a 90% confidence interval for the difference in the percentage of smokers between black and white adults in New Jersey.
b) Does this survey indicate a race-based difference in smoking among American adults? Explain, using your confidence interval to test an appropriate hypothesis.
c) What alpha level did your test use?
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For each of the following statistical tests, state the null hypothesis and the two sided alternative hypothesis.
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(Steiner Tree Problem Heuristic) We are given a connected graph G with a nonnegative weight aij for each arc (i, j) ∈ A. We assume that if an arc (i, j) is present, the reverse arc (j, i) is also present, and aij = aji.
assume that the average life expectancy of a beagle is 13.3 years and that 60 of beagles lives to 12 to 15 years and
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Mimi is interested in testing the claim that more than 75% of the adults believe in global warming. She conducted a survey on a random sample of 100 adults. Identify the null hypothesis and the alternative hypothesis. Determine the test statistic...
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