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One suggested method for solving the electric-power shortage in a region involves constructing floating nuclear power plants a few miles offshore in the ocean. Concern about the possibility of a ship collision with the floating (but anchored) plant has raised the need for an estimate of the density of ship traffic in the area. The number of ships passing within 10 miles of the proposed power-plant location per day, recorded for n = 60 days during July and August, possessed a sample mean and variance of Y = 7.2 and s2 = 8.8.
a. Find a 95% confidence interval for the mean number of ships passing within 10 miles of the proposed power-plant location during a 1-day time period.
b. The density of ship traffic was expected to decrease during the winter months. A sample of n = 90 daily recordings of ship sightings for December, January, and February yielded a mean and variance of Y = 4.7 and s2 = 4.9. Find a 90% confidence interval for the difference in mean density of ship traffic between the summer and winter months.
c. What is the population associated with your estimate in part (b)? What could be wrong with the sampling procedure for parts (a) and (b)?
A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative action programs for women and minorities for admissions to colleges and universities.
Write down the objective coefficient ranges for three components? Interpret these ranges for company management.
a nutrition store in the mall is selling memory booster which is a concoction of herbs and minerals that is intended to
Identify a business research topic and define the research questions for the identified problem or opportunity
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Formulate and present the rationale for a hypothesis test that Par could use to compare the driving distances of the current and new golf balls.
The main part of the ACS contacts 250,000 addresses by mail each month, with follow-up by phone and in person if there is no response. Each household answers questions about their housing, economic, and social status. What is the Population.
A collection of all the test scores for a standardized, post-secondary examination administered in the 1970's across countries along the West African coast, is well-modeled as a random variable X ∼ N (μ, σ2) with μ = 270 and σ = 26.
messages arrive to a computer server according to a poisson distribution with a mean rate of 10 per hour. round your
Given the following number of hours between breakdowns for 4 machines, are the machines significantly different? If so, how are they different? Which machine is the best? Which machine is the worst?
Determine the confidence level used for the given confidence interval.
If there are infinitely many discrete Si , each having more than one point, show that their product topology is not discrete. Show that the product of countably many separable topological spaces, with product topology, is separable.
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