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An article states that movie attendance declined in 2005. A survey found that 740 of 1000 randomly selected adult Americans preferred to watch movies at home rather than at a movie theater. Is there convincing evidence that the majority of adult Americans prefer to watch movies at home? Test the relevant hypotheses using a 0.05 significance level. (Round your test statistic to two decimal places and your P-value to four decimal places.)
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According to a survey of 1000 adult Americans, 220 of those surveyed said playing the lottery would be the most practical way for them to accumulate $200,000 in net wealth in their lifetime. Although the article does not describe how the sample was selected, for purposes of this exercise, assume that the sample can be regarded as a random sample of adult Americans. Is there convincing evidence that more than 20% of adult Americans believe that playing the lottery is the best strategy for accumulating $200,000 in net wealth? Use α = 0.05. (Round your test statistic to two decimal places and your P-value to four decimal places.)
An article in Financial Analysts Journal discusses results of a regression analysis of average price per share P on the independent variable X/k, where X/k is the contemporaneous earnings per share divided by ?rm-speci?c discount rate.
Electrical connectors manufactured by a supply company last an average of 18.2 months and follow a normal distribution with a standard deviation of 1.7 months.
In testing whether each of the independent variables (Xs) in a multiple regression equation is statistically significant in explaining the dependent variable (Y), one uses the:
Find the area under the normal distribution curve between z = 1.52 and z = 2.43.
a mechatronic assembly is subjected to a final functional test. suppose that defects occur at random in these
Question A: What is the expected amount Daniel james will have to pay to mobil in claims? What is the likelihood that Daniel james will actually lose less than the expected amount?Given that Daniel james suffers a loss, what is the likelihood that it..
At a fast food resturant, the expected number of customers who will spend atleast $10 during lunch period from 12:00 to 2:00 is 221 and the variance is 33.15. Assume this is a binomial model.
Suppose that a queueing system fits the M/M/1 model described in Sec. 17.6, with λ = 2 and μ = 4. Evaluate the expected waiting cost per unit time E(WC) for this system when its waiting-cost function has the form
Explain, to a person who has never had a course in statistics, what you have done. (c) Note the ways in which the means and standard deviations differ.
David Gallano, a wine merchant, has collected opinions on grape wine quality from a sample of his customers. These customers tasted wine made from grapes grown in three regions of the country.
what sample size should be used in the funding decision study? Use σ = $4000 as a planning value. ________________
Assuming the manufacturer's claim is correct, what is the probability that the mean of the sample is 47,860 miles or less?
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