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1. For many years businesses have struggled with the rising cost of health care. But recently, the increases have slowed due to less inflation in health care prices and employees paying for a larger portion of health care benefits. A recent Mercer survey showed that 52% of U.S. employers were likely to require higher employee contributions for health care coverage in 2009 (BusinessWeek, February 16, 2009). Suppose the survey was based on a sample of 800 companies. Compute the margin of error and a 95% confidence interval for the proportion of companies likely to require higher employee contributions for health care coverage in 2009.
2. America's young people are heavy Internet users; 87% of Americans ages 12 to 17 are Internet users (The Cincinnati Enquirer, February 7, 2006). MySpace was voted the most popular website by 9% in a sample survey of Internet users in this age group. Suppose 1400 youths participated in the survey. What is the margin of error, and what is the interval estimate of the population proportion for which MySpace is the most popular website? Use a 95% confidence level.
An entrepreneur buys an apartment building with 40 units. The previous owner charged $240 per month for a single apartment and on average rented 32 apartments at that price.
An investment is expected to yield a return of 14% if economic conditions remain healthy, or improve. If a downturn occurs the expected return is just 4%.
Determine which ordered pair is a solution of the system -2x - y^2 = 4 -3x + y = 10
A handbag originally cost $85.00. Now it is priced at $68.00. What is the percent of decrease?
Write a rational expression for his total traveling time. Evaluate that expression for x = 100 km/hr.
1. Determine whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point. f(x) = x^2 + 2x - 9
Suppose A is an m×n matrix and B is the n×m matrix obtained by rotating A ninety degrees clockwise on paper ( not exactly a standard mathematical transformation!). Do A and B have the same singular values? Prove that the answer is yes or give a co..
What is a price taker? Discuss the assumptions that are made in order to obtain the perfectly competitive model. 200-300 words.
The objective is to minimize the sum of the completion times of all the jobs. Provide an integer programming formulation for this problem.
After winning the championships, all Detroit Pistons teammates exchanged "high-fives."Altogether there were 66 high-fives. How many players were there?
justin had $33 dollars before spending n dollars on jeans. How much money remains?
1. Which have you observed used most often in your work or school experience? Why do you think they flourish? 2. What one major objection would you try to prescript to overcome - and what one major point would you make?
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