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Sleep habits of New Yorkers. New York is known as "the city that never sleeps". A random sample of 25 New Yorkers were asked how much sleep they get per night. Statistical summaries of these data are shown below. Do these data provide strong evidence that New Yorkers sleep less than 8 hours a night on average?
(a) Write the hypotheses in symbols and in words.
(b) Check conditions, then calculate the test statistic, T, and the associated degrees of freedom.
(c) Find and interpret the p-value in this context. Drawing a picture may be helpful.
(d) What is the conclusion of the hypothesis test?
(e) If you were to construct a 90% confidence interval that corresponded to this hypothesis test, would you expect 8 hours to be in the interval?
Pick a country in Central or South America to open a business (student choice for type of business and country). Give a brief overview of the business, why you chose the business and why you chose the country. Prepare an expatriate manager (may n..
A 240 horsepower car beginning at a stop goes 1/10 of a mile. At optimum performance, what is the maximum speed in miles per hour the car can reach? Feet per minute?
An urn containsthreered balls,fivewhite balls, andtwoblack balls.Threeballs are drawn from the urn at random without replacement. For each red ball drawn, you win $8, and for each black ball drawn, you lose $12. Let X represent your net winnings.
Probability of Having a Disease when Testing Positive. Suppose that 1% of all people have a particular disease. A test for the disease is 99% accurate. This means that a person who tests positive for the disease has a 99% chance of actually having..
An isosceles trapezoid has an area of 40meter sq. And an altitude of 2m its 2 bases have ratio of 2:3 what are the lengths of the bases and one diagonal of the trapezoid
For the function shown in Figure, at what labeled points is the slope of the graph positive? Negative? At which labeled point does the graph have the greatest.
Is the particle changing direction or always moving in the same direction? Is the particle speeding up or slowing down?
Explain what a SWOT analysis involves. Develop a SWOT analysis for a travel agency in your community.
Construct the dual problem associated with the primal problem. Solve the primal problem.
A semicircular plate rests on the x-axis, between x = -2 and x = 2. Assuming that the density of the plate varies with a continuous mass-density function given by ρ(y) = (1+y) gram / square cm, find the total mass of the plate.
Mikey is getting ready to cut his first cd. The cost of recording the cd is $5000, but copies are $5.00 each. If the cds can be sold for $15.00, how many cds must be sold to breakeven? What is the breakeven point in dollars?
Identify viable alternatives, and select the initial and current optimal software.
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