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Three areas of southern California are prime candidates for forest fires each dry season. You believe (based on historical evidence) that each of these areas, independently of the others, has a 30% chance of having a major forest fire in the next dry season.
a. Find the probability distribution of X, the number of the three regions that have major forest fires in the next dry season.
b. What is the probability that none of the areas will have a major forest fire?
c. What is the probability that all of them will have a major forest fire?
d. What is expected number of regions with major forest fires?
State the null and alternative hypotheses needed to attempt to establish that the advertisement increases the mean attitude score
an index of two store items for 2007 based on 2004 is to be constructed. the information for the prices and quantities
A real estate agent has 2 tours. The first tour through N1and has 10 homes for sale, whereas the second tour through N2and has 5 homes for sale.
At the .01 significance level, is the mean grade of the women higher than that of the men? Set up the 5-step hypothesis testing procedure and solve.
At a used-book sale, 100 books are adult books and 160 are children's books. Of the adult books, 70 are nonfiction while 60 of the children's books are nonfiction. If a book is selected at random, find the probability that is is:
An automobile manufacturer advertises that the mean petrol consumption of its new hybrid car does not exceed 4.6 litres per 100 km. An independent company decides to test the manufacturer's claim by selecting a random sample of 16 vehicles and mea..
deyoung international academy has students with the following grades 10 had an a 75 had a b 10 had a c and 5 had
Is voting Democrat or Republican independent of the voter being below the age of 40 or 40 plus in this city at the 5% level of signi?cance?
Does this sample indicate that the insurance company should change its premiums because life expectancy has increased?
Given the following data from two independent samples, conduct a one-tailed hypothesis test to determine if the first sample mean is larger than the second sample mean, given a 0.05 level of significance.
State the research question and statistical null and alternative hypotheses; and Explain why this test is appropriate and why the correlation, t-test, regression, or ANOVA is not appropriate.
Construct a times series plot. What type of pattern exists in the data and use trial and error to find a value of the exponential smoothing coefficient α that results in a relatively small MSE
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